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644 Cards in this Set

  • Front
  • Back
what's the hip bone formed by?
fusion of ilium, ischium, and pubis of pelvis
what does the hip bone articulate w/?
sacrum @ sacroiliac joint to form pelvic girdle
what part of hip bone does ilium make up?
lateral part
what does the ilium, pubis, and ischium join to form?
acetabulum
what are the parts of the ilium?
body
ala/wing
anterior-superior iliac spine
anterior-inferior iliac spine
posterior iliac spine
greater sciatic notch
iliac fossa
gluteal lines
what does the pubis form?
anterior part of acetabulum
anteromedial part of hip bone
what does the ischium form?
posteroinferior part of acetabulum
lower posterior part of hip bone
what are the parts of the pubis?
body
superior ramus
inferior ramus
part of obturator foramen
what are the parts of the ischium?
body
ramus
ischial spine
ischial tuberosity
lesser sciatic notch
what's the ischiopubic ramus formed by?
ischium joining inferior pubic ramus
what is the acetabulum?
incomplete cup-shaped cavity on lateral side of hip bone where femur fits
what are the parts of the acetabulum?
acetabular notch
what's it formed by?
ilium- superiorly
ischium-posteroinferiorly
pubis-anteromedially
what's the femur's claim to fame?
longest and strongest bone in body!
what are the main parts of the femur?
head
neck
greater trochanter
lesser trochanter
linea aspera
pectineal line
adductor tubercle
how is head of femur positioned in acetabulum?
directed medially, upward, and slightly forward to fit
what is a special part of femur head?
fovea capitis femoris- depression in articular surface
how do you dislocate the femoral head?
you get old! (osteoperosis)
how do you fix a dislocated femoral head?
hip replacement
how does a dislocated femoral head present?
shortened lower limb w/ medial rotation
what happens if you fracture the neck of the femur? why?
ischemic necrosis of the neck and head b/c of an interruption of blood supply from the medial femoral circumflex artery
how does a fractured femur neck present in clinic?
pull of distal fragment upward by quadriceps femoris, adductors and hamstring muscles so that the affected lower limb is shortened w/ lateral rotation
what is a pertrochanteric fracture?
-femoral fracture thru trochanters
-form of extracapsular hip fracture
who is pertrochanteric fracture more common in?
elderly women than men b/c osteoperosis contribs to this
what does the neck of the femur do?
connects the head to the body
forms an angle of about 125 degrees w/ the shaft
fractures commonly!
what is the neck separated from the shaft by?
intertrochanteric line
where is the greater trochanter?
projects upward from the junction of the neck with the shaft
where is the lesser trochanter?
lies in angle b/w neck and shaft
projects at the inferior end of the intertrochanteric crest
what's the linea aspera?
rough line or ridge on the body of the femur
where's the pectineal line?
runs from lesser trochanter to medial lip of linea aspera
what's the adductor tubercle?
small prominence at uppermost part of medial femoral condyle
what's the result of a dislocated knee or fractured distal femur?
may injure the popliteal artery b/c of the artery's deep position next to femur and knee joint capsule
how do you get a transverse patellar fracture?
from a blow to the knee or from sudden contraction of the quadriceps muscle
what's the result of the transverse patellar fracture?
-proximal fragment of patella is pulled superiorly w/ quadriceps tendon
-distal fragment stays w/ patellar ligament
what's a bumper fracture?
fracture of the lateral tibial condyle that's caused by an automobile bumper
what's the result of a bumper fracture?
common peroneal nerve injury
what's the patella's claim to fame?
largest sesamoid bone
what are the patella's funcs?
-prevents wear and attrition (wearing down) on the quadriceps tendon as it passes across the trochlear groove
-increases angle of pull of quadriceps femoris, magnifying its power
what tendon encloses the patella?
w/i the quadriceps femoris tendon
what are the tibia's funcs?
-weight-bearing medial bone of leg
-has tibial tuberosity that patellar ligament uses as an insertion
-articulates w/ femur condyles by using its medial and lateral condyles
what are the tibia's parts?
tibial tuberosity
medial condyles
lateral condyles
medial malleolus
malleolar groove
what's the fibula's func?
not weight bearing
provides attachment for muscles
-lateral malleolus articulates w/ trochlea of talus
what are the parts of the fibula?
head
lateral malleolus
sulcus
what is Pott's fracture (Dupuytren's fracture)?
fracture of the lower end of the fibula
what fractures often accompany Pott's fracture (Dupuytren's fracture)?
medial malleolus frature
deltoid ligament rupture
what causes Pott's fracture (Dupuytren's fracture)?
forced eversion of foot
what's Pillion's fracture?
T-shaped fracture of the distal femur w/ displacement of the condyles
what causes Pillion's fracture?
blow to the flexed knee of a person riding pillion on a motorcycle (riding on the seat behind the main seat)
what's the result of a fracture of the fibular neck?
injury to the common peroneal nerve
what's the result of the fracture of the fibular neck?
common peroneal n injury:
paralysis of all muscles in the anterior and lateral compartments of the leg (dorsiflexors and evertors of the foot), causing foot drop!
how many bones in tarsus?
7 tarsal bones
list the bones of the tarsus:
talus
calcaneus
navicular bone
cuboid bone
3 cuneiform bones
what is the func of the talus?
-transmits the weight of the body from the tibia to the foot
-its head serves as the keystone of the medial longitudinal arch of the foot
what's the talus' claim to fame?
only tarsal bone w/o muscle attachments
what are the parts of the talus?
neck
sulcus tali
body
head
what's calcaneus' claim to fame?
largest and strongest bone of foot
where is the calcaneus?
lies below the talus
what are the parts of calcaneus?
sustentaculum tali
groove
what's the calcaneus' func?
forms the heel of the foot
provides an att for Achilles tendon
what's the sustentaculum tali?
medial projection from the calcaneus
supports the head of the talus
has groove
what's the navicular bone?
boat-shaped tarsal bone b/w the head of the talus and the 3 cuneiform bones
what's special about the cuboid bone?
-most lateraly placed tarsal bone
-serves as keystone of lateral longitudinal arch of foot
what are the cuneiform bones?
3 wedge shaped bones that form part of medial longitudinal and proximal transverse arches
what is the metatarsus made up of?
5 metatarsals
what's the march fracture (stress fracture)?
fatigue fracture of one of the metatarsals
how can you get the march fracture?
prolonged walking
what population has common metatarsal fractures?
female ballet dancers when they lose their balance and put their full body weight on the metatarsals
how many phalanges?
14 bones: 2 in 1st digit
3 in ea other digit
what type of joint is the hip (coxal) joint?
multiaxial ball-and-socket synovial joint
what is the hip joint a joint b/w?
acetabulum of hip bone and head of femur
what mvmnts does hip joint allow?
abduction
adduction
flexion
extension
circumduction
rotation
what stabilizes hip joint?
acetabular labrum
fibrous capsule
capsular ligaments
what deepens the hip joint cavity?
fibrocartilaginous acetabular labrum
what completes the hip joint cavity?
transverse acetabular ligament, which converts acetabular notch into foramen for passage of nutrient vessels and nerves
what supplies the blood to the hip joint?
medial femoral circumflex arteries
lateral femoral circumflex arteris
superior gluteal
inferior gluteal
obturator arteries
what artery does the posterior branch of the obturator artery give rise to?
artery of ligamentum teres capitis femoris
what's the acetabular labrum?
complete fibrocartilage rim that deepens articular socket for the head of the femur and then stabilizes the hip joint
what does the fibrous capsule of the hip joint enclose?
part of the head of the femur
most of the neck of the femur
what reinforces the fibrous capsule of the hip joint?
ant- iliofemoral ligament
post- ischiofemoral ligament
inf- pubofemoral ligament
what's coxa valga?
alteration of the angle made by the axis of the femoral neck to the axis of the femoral shaft
angle exceeds 135 degrees
femoral neck straightens out
what's coxa vara?
alteration of angle made by axis of femoral neck to the axis of the femoral shaft
angle is less than 135 degrees
femoral neck becomes more horizontal
what's the iliofemoral ligament?
largest and most important ligament that reinforces the fibrous capsule anteriorly
in form of an inverted Y
what's the purpose of the iliofemoral ligament?
resists hyperextension and lateral rotation at the hip joint during standing
what's the purpose of the ischiofemoral ligament?
reinforces the fibrous capsule posteriorly
limits extension and medial rotation of the thigh
what's the purpose of the pubofemoral ligament?
reinforces the fibrous capsule inferiorly
limits extension and abduction
what's the round ligament of the head of femur?
ligamentum teres capitis femoris
what's the purpose of ligamentum teres capitis femoris?
provides pathway for the artery of the ligamentum capitis femoris (foveolar artery) from the obturator artery
what's the importance of the foveolar artery?
supplies significant amt of blood to femoral head during childhood
what's the func of the transverse acetabular ligament?
bridges acetabular notch
converts acetabular notch into a foramen that allows entrance of nutrient vessels into joint
what's the largest and most complicated joint?
knee joint!
what type of joint is knee joint?
condylar type of synovial joint
saddle joint
what is condylar type of synovial joint of knee b/w?
2 condyles of femur and tibia
what's saddle joint of knee b/w?
femur and patella
what encompasses the knee joint?
fibrous capsule
describe fibrous capsule?
thin, weak and incomplete
surrounds lateral and post aspects of knee joint
what mvmnts does knee joint permit?
flexion
extension
some gliding
rotation in flexed position
full extension w/ medial rotation
what stabilizes the knee joint laterally?
laterally- biceps and gastrocnemius
iliotibial tract
fibular collateral ligaments
what stabilizes the knee joint medially?
sartorius
gracilis
gastrocnemius
semitendinosus
semimembranosus
tibial collateral ligament
what does knee joint get blood from?
genicular branches of popliteal artery
descending branch of lateral femoral circumflex artery
articular branch of descending genicular artery
anterior tibial recurrent artery
what's the knee innervated by?
sciatic n
femoral n
obturator n
what supports knee?
several ligaments
menisci
what does hemarthrosis (blood in joint) cause?
rapid swelling of injured knee joint
what does inflammatory joint effusion cause?
slow swelling of knee joint
what are the ligaments of the knee?
anterior cruciate ligament
posterior cruciate ligament
where is the anterior cruciate ligament?
inside knee joint capsule
outside synovial cavity of joint
how does the ACL compare to the PCL?
ACL IS LONGER
what's the purpose of the ACL?
prevents forward sliding of the tibia on the femur (or posterior displacement of the femur on the tibia)
prevents knee joint hyperextension
when is ACL taut and when is it lax?
taut- knee extension
lax- knee flexion
how does ACL get torn?
when knee is hyperextended
where is the posterior cruciate ligament?
outside synovial cavity
inside fibrous joint capsule
what condyles do ACL and PCL att to?
ACL- lateral femoral condyle
PCL- medial femoral condyle
how does PCL compare in size to ACL?
PCL is shorter, straighter and stronger than ACL
what's the func of PCL?
prevents backward sliding of tibia on femur (or anterior displacement of femur on tibia)
limits hyperflexion of knee
when is PCL taut? lax?
taut- knee flexion
lax- knee extension
what's the anterior drawer sign?
forward sliding of tibia on femur b/c of ACL rupture
what's the posterior drawer sign?
backward sliding of tibia on femur caused by PCL rupture
which meniscus of knee is more frequently torn in injuries? why?
medial meniscus b/c of its strong att to tibial collateral ligament
where is the medial meniscus?
outside synovial cavity
w/i joint capsule
what's the shape of meniscus?
C-shaped: semicircle
what's the func of medial meniscus?
acts as cushion or shock absorber
lubricates articular surfaces by distributing synovial fluid in windshield wiper fashion
when does "unhappy triad" of knee joint happen?
when football player's cleated shoe is planted firmly in turf and knee is struck from lateral side
how does an "unhappy triad" present?
markedly swollen knee, (esp in suprapatellar region)
results in tenderness on application of pressure along tibial collateral ligament
what is damaged in "unhappy triad"?
-rupture of tibial collateral ligament
-tearing of anterior cruciate ligament b/c of forward displacement of tibia
-injury to medial meniscus b/c of att to tibial collateral ligament att
where is the lateral meniscus?
outside synovial cavity
within joint capsule
what's the shape of lateral meniscus?
nearly circular
what's the func of lateral meniscus?
acts as a cushion
facilitates lubrication
forms more stable base for articulation of femoral condyle
what happens if medial (tibial) collateral ligament is damaged? why?
results in injury to medial meniscus b/c the 2 are firmly attached to ea other
what's the func of the medial (tibial) collateral ligament?
-prevents medial displacement of 2 long bones and thus abduction of the leg @ the knee
-becomes taut on extension and limits extension and abduction of leg
what's the func of the medial (tibial) collateral ligament?
prevents medial displacement of the 2 long bones and thus abduction of the leg at the knee becomes taut on extension and thus limits extension and abduction of the leg
what is knock knee (genu valgum)?
deformity in which the tibia is bent or twisted laterally
what can cause knock knee?
from collapse of the lateral compartment of the knee and rupture of the medial collateral ligament
what is bowleg (genu varum)?
deformity in which the tibia is bent medially
what can cause bowleg?
collapse of the medial compartment of the knee and rupture of the lateral collateral ligament
what's the func of the lateral (fibular) collateral ligament?
becomes taut on extension and limits extension and adduction of the leg
which ligament is a continuation of the quadriceps femoris tendon?
patellar ligament
what's the patellar ligament's claim to fame?
part of it can be used to fix the anterior cruciate ligament
what's the patellar tendon reflex?
a tap on the patellar tendon elicits extension of the knee joint
where are both the afferent and efferent limbs of the reflex arc for the patellar tendon reflex?
femoral nerve (L2-L4)
what can be used for tendon autografts to the long flexors of the fingers?
plantaris muscle tendon
what are the intracapsular ligaments of the knee?
ACL, PCL, medial meniscus, lateral meniscus, transverse ligament
what are the extracapsular ligaments of the knee?
medial (tibial) collateral ligament, lateral (fibular) collateral ligament, patellar ligament (tendon), arcuate popliteal ligament, oblique popliteal ligament, popliteus tendon
what's the func of oblique popliteal ligament?
resists hyperextension of the leg and lateral rotation during the final phase of extension
what tendon is the oblique popliteal ligament an oblique expansion of?
semimembranosus tendon
what's the major bursa communicating w/ the knee joint cavity?
suprapatellar bursa
what other bursa also may communicate w/ the knee joint cavity?
semimembranosus bursa
list the bursae of the knee:
suprapatellar bursa, prepatellar bursa, infrapatellar bursa, anserine bursa/ pes anserinus
what's the infrapatellar bursa consist of?
subcutaneous infrapatellar bursa, deep infrapatellar bursa
what's prepatellar bursitis (housemaid's knee)?
inflammation and swelling of the prepatellar bursa
what's a popliteal (Baker's) cyst?
swelling behind the knee
what can cause popliteal cyst?
knee arthritis, meniscus injury, herniation or tear of the joint capsule
what is impaired by a popliteal cyst?
flexion and extension of the knee joint
what makes the popliteal cyst pain worse?
worse when knee fully extended, like during prolonged standing or walking
how do you treat a popliteal cyst?
draining and decompressing the cyst
list the tibiofibular joints:
proximal tibiofibular joint, distal tibiofibular joint
what type of joint is the proximal tibiofibular joint?
plane-type synovial joint b/w the head of the fibula and tibia
what type of mvmnt does the proximal tibiofibular joint allow?
little gliding mvmnt
what type of joint is the distal tibiofibular joint?
fibrous joint b/w the tibia and fibula
what type of joint is the ankle (talocrural) joint?
hinge-type (ginglymus) synovial joint b/w the tibia and fibula superiorly and the trochlea of the talus inferiorly
what mvmnts does the ankle (talocrural) joint allow?
dorsiflexion and plantar flexion
what's the articular capsule?
thin, fibrous capsule that lies anteriorly and posteriorly, allowing mvmnt in the ankle
what reinforces the articular capsule?
medially- medial (deltoid) ligament laterally- lateral (collateral) ligament
why does articular capsule need to be reinforced?
prevents anterior/posterior slipping of the tibia and fibula on the talus
what are the 4 parts of the medial (deltoid) ligament?
tibionavicular, tibiocalcaneal, anterior tibiotalar, posterior tibiotalar ligaments
what's the func of the medial (deltoid) ligament?
prevents overeversion of the foot and helps maintain the medial longitudinal arch
what are the 3 parts of the lateral ligament?
anterior talofibular, posterior talofibular, calcaneofibular ligaments
what's the func of the lateral ligaments?
resists inversion of the foot
which ligament may be torn during an ankle sprain (inversion injury)?
lateral ligament
what are the 4 intertarsal joints?
talocalcaneal (subtalar) joint, talocalcaneonavicular joint, calcaneocuboid joint, transverse tarsal (midtarsal) joint
what type of joint is the talocalcaneal (subtalar) joint?
plane synovial joint b/w the talus and calcaneus bones
what funcs does the talocalcaneal joint allow?
inversion and eversion of the foot
what type of joint is the talocalcaneonavicular joint?
ball and socket joint b/w talus (ball) and calcaneus and navcular bones (socket)
what supports the talocalcaneonavicular joint?
spring (plantar calcaneonavicular) ligament
what type of joint is the calcaneocuboid joint?
resembles saddle joint b/w calcaneus and cuboid bones
what supports the calcaneocuboid joint?
short plantar (plantar calcaneocuboid) and long plantar ligaments and the tendon of the peroneus longus muscle
what's the transverse tarsal (midtarsal) joint?
collective term for the talonavicular part of the talocalcaneonavicular joint and the calcaneocuboid joint … the two joints are separated anatomically, but act together functionally
what's the func of the transverse tarsal (midtarsal) joint?
inversion and eversion of the foot
what type of joint is the tarsometatarsal joint?
plane synovial joints that strengthen the transverse arch
what unites the tarsometatarsal joints?
articular capsules
what reinforces the tarsometatarsal joints?
plantar, dorsal, and interosseous ligaments
what type of joint is the metatarsophalangeal joint?
ellipsoid (condyloid) synovial joint
what unites the metatarsophalangeal joint?
articular capsules
what reinforces the metatarsophalangeal joint?
plantar and collateral ligaments
what's a bunion?
localized swelling @ the medial side of the 1st metatarsophalangeal joint (or of the first metatarsal head)
what causes a bunion?
inflammatory bursa.. And it's unusually associated w/ hallux valgus
what's a bunionectomy?
excision of an abnormal prominence on the medial part of the 1st metatarsal head
what's a hallux valgus?
lateral deviation of the big toe
what symptom is hallux valgus frequently accompanied w/?
swelling (bunion) on the medial aspect of the 1st metatarsophalangeal joint
what's a hallux varus?
medial deviation of the big toe
what type of joint is the interphalangeal joint?
hinge-type (ginglymus) synovial joints
what joins the interphalangeal joint?
articular capsules
what reinforces the interphalangeal joint?
plantar and collateral ligaments
what plexus does the lateral femoral cutaneous n come from?
lumbar plexus
what nerve levels does lateral femoral cutaneous n come from?
L2, L3
what does the lateral femoral cutaneous n innervate?
skin on the anterior and lateral aspects of the thigh as far as the knee
what do the clunial (buttock) nerves innervate?
skin of the gluteal region
what are the branches of the clunial nerves?
superior- lateral branches of the dorsal rami of the upper 3 lumbar nerves
middle- lateral branches of the dorsal rami of the upper 3 sacral n
inferior- gluteal branches of the posterior femoral cutaneous nerve
what plexus does the posterior femoral cutaneous nerve come from?
sacral plexus
what nerve levels does the posterior femoral cutaneous nerve come from?
S1, S2, S3
what nerves go thru the greater sciatic foramen?
sciatic nerve and posterior femoral cutaneous nerve, superior/inferior gluteal nn, pudendal n, n to obturator internus, n to quadratus femoris
what does the posterior femoral cutaneous nerve innervate?
skin of buttock, thigh and calf
where does the saphenous n come from?
from femoral n in the femoral triangle
what vessels does saphenous n accompany thru the femoral triangle?
femoral vessels
what vessels does the saphenous n descend down leg w/?
great saphenous vein
what does the saphenous n innervate?
skin on medial part of the leg and foot
how can the saphenous n be injured?
its proximal part can be injured during surgery to repair varicose veins
where does the lateral sural cutaneous n come from?
common peroneal n in the popliteal fossa
does the lateral sural cutaneous n communicate w/ the medial sural cutaneous n?
it may
what does the lateral sural cutaneous n innervate?
skin on posterolateral part of leg
where does the medial sural cutaneous n come from?
tibial n in the popliteal fossa
what happens if the medial sural cutaneous n and lateral sural cutaneous n join?
they form the sural nerve
what does the medial sural cutaneous n innervate?
innerv skin on the back of the leg and the lateral part of the ankle, heel and foot
what does the sural n innervate?
skin on back of the leg and the lateral part of the ankle, heel and foot
what does the superficial peroneal n innervate?
skin on the lateral side of the lower leg and the dorsum of the foot
what nn does the superficial peroneal n divide into?
medial dorsal cutaneous n and intermediate dorsal cutaneous n
what does the medial dorsal cutaneous n innerv?
medial sides of foot and ankle, medial side of great toe and adjacent sides of the 2nd and 3rd toes
what does the intermediate dorsal cutaneous n innerv?
skin of the lateral sides of the foot and ankle and adjacent sides of the 3rd, 4th, and little toes
what does the deep peroneal n innerv?
anterior muscles of leg and foot and skin of the contiguous sides of the first and second toes
where does the great saphenous vein begin?
at the medial end of the dorsal venous arch of the foot
what vein does the great saphenous v join?
passes thru the saphenous opening (fossa ovalis) to join femoral vein
what veins does the great saphenous vein receive?
external pudendal, superficial epigastric, superficial circumflex ilia, lateral femoral cutaneous and accessory saphenous veins
what is a good vessel to use in coronary artery bypass surgery?
great saphenous vein
what's a good vessel to use for venipuncture?
great saphenous vein
what n is vulnerable to injury when the great saphenous vein is harvested for bypass?
saphenous n
how do you prepare the great saphenous v for the bypass?
reverse the vein so the valves don't obstruct blood flow in the graft
what happens to the great saphenous v in the leg?
vein and its tributaries become dilated and varicosed
where are varicose veins common?
posteromedial parts of lower limb
where does the small (short) saphenous vein begin?
at the lateral end of the dorsal venous arch
where n does the small saphenous v accompany?
sural n
where does small saphenous v go w/ sural n and where does it end?
goes thru the popliteal fossa where it ends in the popliteal v
what's a thrombophlebitis?
venous inflammation w/ thrombus formation that happens in the superficial veins in the lower limb
what can thrombophlebitis lead to?
pulmonary embolism
where do most pulmonary emboli originate?
in deep veins
what can reduce the risk of embolism?
anticoagulant treatment
where do varicose veins develop?
develop in superficial veins of the lower limb
why do varicose veins develop?
reduced elasticity and incompetent valves in the veins or thrombophlebitis of the deep veins
what are superfical lymph vessels formed by?
vessels from the gluteal region, abdominal wall and external genitalia
what groups are the superficial lymph vessels divided into?
medial group and lateral group
what does the medial group of superficial lymph vessels follow?
great saphenous vein to the end in the inguinal nodes
what does the lateral group of superficial lymph vessels follow?
small saphenous vein to end in popliteal nodes… their efferent follow femoral vessels to end in inguinal nodes
what are the deep lymph vessels made of?
anterior tibial, posterior tibial, peroneal vessels
what do the deep lymph vessels enter?
popliteal lymph nodes
what path do the lymph vessels from the popliteal nodes take?
accompany femoral vessels to the inguinal nodes, which enter external iliac nodes and ultimately drain into the lumbar (aortic) nodes and vessels
where are the superficial inguinal grp of lymph nodes?
subcutaneously near the saphenofemoral junction
what do the superficial inguinal grp of lymph nodes drain?
superficial thigh region
what nodes does the superficial inguinal grp of lymph nodes drain into?
external iliac nodes
where does the superficial inguinal grp of lymph nodes receive lymph from?
receives lymph from the anterolateral abdominal wall below the umbilicus, gluteal region, lower parts of the vagina and anus, and external genitalia except the glans
where's the deep inguinal grp of lymph nodes?
lies deep to the fascia lata on the medial side of the femoral vein
where does the deep inguinal grp of lymph nodes receive lymph from?
deep lymph vessels (efferents of popliteal nodes) that accompany femoral vessels and from glans penis or glans clitoris, and drains into external iliac nodes through the femoral canal
what ligaments turns the lesser sciatic notch into the lesser sciatic foramen?
sacrotuberous ligament and sacrospinous ligament
what ligament converts the greater sciatic notch into the greater sciatic foramen?
sacrospinous ligament
what muscles have pathway thru greater sciatic foramen?
piriformis muscle
what vessels have pathway thru greater sciatic foramen?
superior/ inferior gluteal vessels, internal pudendal vessels
what muscles have pathway thru lesser sciatic foramen?
obturator internus TENDON
what nn have pathway thru lesser sciatic foramen?
n to obturator internus, pudendal n
what vessels have pathway thru lesser sciatic foramen?
internal pudendal vessels
what passes thru both the greater sciatic foramen and the lesser sciatic foramen?
pudendal n, n to obturator internus, internal pudendal vessels
what's the iliotibial tract?
thick lateral part of the fascia lata
what's the func of the iliotibial tract?
forms fibrous capsule of knee joint, maintains posture and locomotion, provides insertion for gluteus maximus and tensor fasciae latae muscles
what's fascia lata?
membranous, deep fascia covering muscles of the thigh
what does fascia lata form?
lateral and medial intermuscular septa by its inward extension to the femur
what's gluteal gait (gluteus medius limp)?
waddling gait : pelvis falls (droops) towards unaffected side when the opposite leg is raised @ each step
what causes gluteal gait (gluteus medius limp)?
paralysis of the gluteus medius muscle, which normally functions to stabilize the pelvis when the opposite foot is off the ground
what is a common site for the intramuscular injection of medications?
gluteal region: superior lateral quadrant to avoid injury to the underlying sciatic nerve and others
what are the muscles of the gluteal region?
gluteus maximus, gluteus medius, gluteus minimus, tensor fascia latae, piriformis, obturator internus, superior gemellus, inferior gemellus, quadratus femoris
what are the posterior muscles of the thigh?
semitendinous, semimembranosus, biceps femoris
what n innerv gluteus maximus?
inferior gluteal
what n innerv gluteus medius?
superior gluteal
what n innerv gluteus minimus?
superior gluteal
what n innerv tensor fasciae latae?
superior gluteal
what n innerv piriformis?
sacral (S1-S2)
what n innerv obturator internus?
n to obturator internus
what n innerv superior gemellus?
n to obturator internus
what n innerv inferior gemellus?
n to quadratus femoris
what n innerv quadratus femoris?
n to quadratus femoris
what's the action of gluteus maximus?
extends and rotates thigh laterally
what's the action of gluteus minimus?
abducts and rotates thigh medially
what's the action of gluteus medius?
abducts and rotates thigh medially; stabilizes pelvis
what's the action of tensor fasciae latae?
flexes, abducts, and rotates thigh medially
what's the action of piriformis?
rotates thigh laterally
what's the action of obturator internus?
abducts and rotates thigh laterally
what's the action of superior gemellus?
rotates thigh laterally
what's the action of inferior gemellus?
rotates thigh laterally
what's the action of quadratus femoris?
rotates thigh laterally
what n innerv semitendinosus?
tibial part of sciatic n
what n innerv semimembranosus?
tibial part of sciatic n
what n innerv biceps femoris?
tibial (long head) and common peroneal (short head) : parts of sciatic n
what's the action of semitendinosus?
extends thigh; flexes and rotates leg medially
what's the action of semimembranosus?
extends thigh; flexes and rotates leg medially
what's the action of biceps femoris?
extends thigh; flexes and rotates leg medially
what are the n of the gluteal region?
superior gluteal n, inferior gluteal n, posterior femoral cutaneous n, sciatic n
what are the aa of the gluteal region?
superior gluteal a, inferior gluteal a
what's piriformis syndrome?
condition in which piriformis muscle irritates and places pressure on the sciatic n
what's the result of piriformis syndrome?
pain in buttocks and referring pain along course of sciatic n: sciatica
what causes sciatica?
herniation of a lower lumbar intervertebral disk compromising nerve roots
how can you treat piriformis syndrome?
progressive piriformis stretching.. If this fails, corticosteroid can be injected into the piriformis muscle… still pain? Surgical exploration is your last resort
where do you see a positive trendelenburg's sign?
fracture of femoral neck, dislocated hip joint (head of femur), weakness and paralysis of the gluteus medius and minimus muscle
what's the result of trendelenburg's sign?
can't abduct hip… if right gluteus medius and minimus muscles are paralyzed, the unsupported left side (sound side) of pelvis falls (sags) instead of rising.. Which is weird b/c normally pelvis should rise
who normally gets a hamstring injury/strain (pulled/torn hamstrings)?
ppl who are running, jumping and quick start sports
what happens during a hamstring injury?
origin of hamstrings from the ischial tuberosity may be avulsed, resulting in blood vessel rupture
what causes hamstring injury?
avulsion of ischial tuberosity may result from forcible flexion of hip w/ knee extended
so when hamstrings are torn, does it hurt?
VERY PAINFUL
what is an anterior dislocation subluxation of the hip joint?
tearing of joint capsule anteriorly w/ mvmnt of femoral head out from acetabulum
where is the femoral head in relation to the pubic bone or acetabulum during an anterior dislocation subluxation of the hip joint?
lies anteroinferior to the pubic bone or acetabulum
what's a posterior dislocation of the hip joint?
posterior tearing of the joint capsule
what's the result of a posterior dislocation of the hip joint?
resting fractured femoral head on posterior surface of ischium, probaby ruptures both posterior acetabular labrum and ligamentum capitis femoris, injury of the sciatic nerve
what happens to the affected limb during posterior dislocation of the hip joint?
affected limb is shortened, adducted and medially rotated
what is medial or intrapelvic dislocation of the hip joint?
tearing of joint capsule medially
what's the result of medial or intrapelvic dislocation of the hip joint?
dislocated femoral head lies medial to pubic bone, possible acetabular fracture and bladder rupture
what's the femoral triangle bounded by?
superiorly- inguinal ligament laterally- sartorius muscle medially- adductor longus muscle
what's the floor of the femoral triangle bounded by?
iliopsoas, pectineus, adductor longus muscles
what's the roof of the femoral triangle bounded by?
fascia lata and cribiform fascia
what strucs are in the femoral triangle?
femoral Nerve Artery Vein Lymphatics (lateral to medial)
what's the abdominal opening of the femoral canal?
femoral ring
what's the femoral ring bounded by?
anteriorly- inguinal ligament laterally- femoral vein medially- lacunar ligament posteriorly- pectineal ligament
where's the femoral canal?
medial to femoral vein in the femoral sheath
what contents are in the femoral canal?
fat, areolar conn tissue, lymph nodes and vessels
what's the func of the femoral canal?
transmits lymphatics from the lower limb and perineum to the peritoneal cavity
what's the clinical significance of the femoral canal?
potential weak area site of femoral herniation, which happens more frequently in women b/c of the greater width of the superior pubic ramus of the female pelvis
who is a femoral hernia more common in?
women
where is the femoral hernia located?
passes thru femoral ring and canal, lies lateral and inferior to pubic tubercle and deep and inferior to inguinal ligament
what is the femoral hernia's sac formed by?
parietal peritoneum
what's a complication of the femoral hernia that can happen?
strangulation of a femoral hernia may happen b/c of sharp, stiff boundaries of femoral ring, and strangulation interferes w/ the blood supply to the herniated intestine --> tissue death
what's the femoral sheath formed by?
prolongation of the transversalis and iliac fascia in the thigh
what does the femoral sheath contain?
femoral artery and vein, femoral branch of the genitofemoral nerve, and the femoral canal (femoral n lies outside the femoral sheath, lateral to the femoral a
how does the femoral sheath rech the level of the proximal end of the saphenous opening?
with its distal end
where does the adductor canal begin and end?
begins- apex of femoral triangle ends- adductor hiatus (hiatus tendineus)
where is the adductor canal ?
b/w the adductor magnus and longus muscles and the vastus medialis muscle and is covered by the sartorius muscle and fascia
what does the adductor canal contain?
femoral vessels, saphenous nerve, n to vastus medialis, and descending genicular artery
what is the adductor hiatus (hiatus tendineus)?
aperture in the tendon of insertion of the adductor magnus
what's the significance of the adductor hiatus?
allows passage of the femoral vessels into the popliteal fossa
what's the saphenous opening?
oval gap in the fascia lata below the inguinal ligament that's covered by the cribiform fascia
what are other names of the saphenous opening?
saphenous hiatus or fossa ovalis
what's the cribiform fascia?
part of the superficial fascia of the thigh
what's the significance of the saphenous opening?
pathway for greater saphenous vein
what are the anterior muscles of the thigh?
iliacus, sartorius, rectus femoris, vastus medialis, vastus lateralis, vastus intermedius
what n supplies the anterior thigh muscles?
femoral n
what n supplies the sartorius muscle?
femoral n
what n supplies the rectus femoris muscle?
femoral n
what n supplies the vastus medialis?
femoral n
what n supplies the vastus lateralis?
femoral n
what n supplies the vastus intermedius?
femoral n
what's a groin injury/pulled groin?
strain, stretching or tearing of the origin of the flexor and adductor of the thigh
how does a groin injury often occur?
in sports that require quick starts, like the 100-meter dash and football
what's the clinical significance of the gracilis?
relatively weak member of the adductor grp of muscles and thus surgeons often transplant this muscle or part of it, with nerve and blood vessels, to replace a damaged muscle in the hand
what are the proximal muscle attachments of the gracilis?
inguinal region or groin
what are muscle strains of the adductor longus?
may happen in horseback riders and make pain b/c the riders adduct their thighs to keep from falling from animals
what's the action of the iliacus muscle?
flexes thigh (w/ psoas major)
what's the action of the sartorius muscle?
flexes and rotates thigh laterally, flexes and rotates leg medially
what's the action of the rectus femoris muscle?
flexes thigh; extends leg
what's the action of the vastus medialis?
extends leg
what's the action of the vastus lateralis?
extends leg
what's the action of the vastus intermedius?
extends leg
what n supplies the adductor longus?
obturator
what n supplies the adductor brevis?
obturator
what n supplies the adductor magnus?
obturator and sciatic (tibial part)
what n supplies the pectineus?
obturator and femoral n
what n supplies the gracilis?
obturator n
what n supplies the obturator externus?
obturator n
what's the action of the adductor longus muscle?
adducts and flexes thigh
what's the action of the adductor brevis muscle?
adducts and flexes thigh
what's the action of the adductor magnus muscle?
adducts, flexes and extends thigh
what's the action of the pectineus muscle?
adducts and flexes thigh
what's the action of the gracilis muscle?
adducts and flexes thigh; flexes and rotates leg medially
what's the action of the obturator externus muscle?
rotates thigh laterally
what's the popliteal fossa bounded by superomedially and superolaterally?
superomedially- semitendinosus and semimembranosus muscles superolaterally- biceps muscle
what's the popliteal fossa bounded by inferolaterally and inferomedially?
inferolaterally- lateral head of the gastrocnemius and plantaris muscles
inferomedially - medial head of the gastrocnemius muscle
what's the floor of the popliteal fossa made of?
femur, oblique popliteal ligament, popliteus muscle
what does the popliteal fossa contain?
popliteal vessels, common peroneal and tibial nerves and the small saphenous vein
what's the pes anserinus?
combined tendinous expansions of the sartorius, gracilis, and semitendinosus muscles at the medial border of the tuberosity of the tibia
what's the clinical significance of the pes anserinus?
may be used to surgically repair the anterior cruciate ligament of the knee joint
what are the anterior and lateral muscles of the leg?
tibialis anterior, extensor hallucis longus, extensor digitorum longus, peroneus (fibularis) tertius, peroneus (fibularis) longus, and peroneus (fibularis) brevis
what's the lateral part of the anterior and lateral muscles of the leg?
peroneus (fibularis) longus and peroneus (fibularis) brevis
what does deep peroneal n supply?
anterior and lateral leg muscles:
tibialis anterior
extensor hallucis longus
extensor digitorum longus
peroneus (fibularis) tertius
.
.
.
.
what does the superficial peroneal (fibular) n supply?
anterior and lateral leg muscles:
peroneus (fibularis) longus
peroneus (fibularis) brevis
what's the action of the tibialis anterior?
dorsiflexes and inverts foot
what's the action of the extensor hallucis longus muscle?
extends big toe, dorsiflexes and invertes foot
what's the action of the extensor digitorum longus muscle?
extends toes, dorsiflexes and everts foot
what's the action of the peroneus (fibularis) tertius muscle?
dorsiflexes and everts foot
what's the action of the peroneus (fibularis) brevis muscle?
everts and plantar flexes foot
what are the posterior muscles of the leg?
gastrocnemius, soleus, plantaris, popliteus, flexor hallucis longus, flexor digitorum longus, tibialis posterior
what muscles make up the superficial grp of the posterior muscles of the leg?
gastrocnemius, soleus, and plantaris
what muscles make up the deep grp of the posterior muscles of the leg?
popliteus, flexor hallucis longus, flexor digitorum longus, tibialis posterior
what n supplies the gastrocnemius muscle?
tibial
what n supplies the soleus muscle?
tibial
what n supplies the plantaris muscle?
tibial
what n supplies the popliteus muscle?
tibial
what n supplies the flexor hallucis longus muscle?
tibial
what n supplies the flexor digitorum longus muscle?
tibial
what n supplies the tibialis posterior muscle?
tibial
what's the action of the gastrocnemius?
flexes knee; plantar flexes foot
what's the action of the soleus muscle?
plantar flexes foot
what's the action of the plantaris muscle?
flexes leg; plantar flexes foot
what's the action of the popliteus muscle?
flexes by unlocking knee and rotates leg medially
what's the action of the flexor hallucis longus muscle?
plantar flexes foot; flexes distal phalanx of big toe
what's the action of the flexor digitorum longus muscle?
flexes lateral 4 toes; plantar flexes foot
what's the action of the tibialis posterior muscle?
plantar flexes and inverts foot
what’s anterior tibial compartment syndrome?
ischemic necrosis of the muscles of the anterior compartment of the leg
why does anterior tibial compartment syndrome occur?
b/c of compression of arteries (anterior tibial a and its branches) by swollen muscles, following excessive exertion
what are the symptoms of anterior tibial compartment syndrome?
extreme tenderness and pain on the anterolateral part of the leg
what is a shin splint?
painful condition of the anterior compartment of the leg along the thin bone (tibia)
what's shin splint caused by?
swollen muscles in the anterior compartment, especially the tibialis anterior muscle, after athletic overexertion
what might shin splints be a mild form of?
anterior compartment syndrome
what's a muscle cramp (charley horse)?
sudden, involuntary, painful contraction of muscles of the lower limb
what causes a muscle cramp/charley horse?
muscle fatigue, overexertion, dehydration, depletion or imbalance of salt and minerals (electrolytes) like calcium, sodium, potassium, and magnesium
what's claudication?
type of calf pain
what can cause claudication?
poor blood supply to leg muscles caused by smoking and atherosclerosis
what are the most commonly affected muscles in muscle cramp/charley horse?
calf muscle (gastrocnemius), hamstrings and quadriceps
what can relieve the muscle cramp/charley horse?
goes away w/I a few minutes, or can be treated by a gentle stretch and massage of the cramped muscle, pain relievers and muscle relaxers
what's intermittent claudicatin?
condition of limping caused by ischemia of the muscles in lower limbs, chiefly the calf muscles
who is intermittent claudication seen in?
occlusive peripheral arterial diseases, especialy the popliteal artery and its branches
what's the main symptom of intermittent claudicaton?
leg pain that happens during walking and intensifies until walking is impossible
what relieves intermittent claudication?
rest
what are the nerves of the leg?
tibial n, common peroneal (fibular) n, deep peroneal (fibular) n, superficial peroneal (fibular) n, sural and medial and lateral sural n
what are the blood vessels of the leg?
popliteal a, posterior tibial a, peroneal (fibular) a, genicular anastomosis
when does the knee jerk happen?
when the patellar ligament is tapped
what's the result of a knee jerk?
sudden contraction of the quadraceps femoris
what does the knee jerk reflex test?
L2-L4 femoral nerve by activating muscle spindle in the quadraceps
what's the reflex arc of the knee jerk?
afferent impulse travel in the femoral n to the spinal cord, efferent impulses are transmited to the quadriceps via motor fibers in the femoral n
what's the superior extensor retinaculum?
broad band of deep fascia extending b/w the tibia and the fibula, above the ankle
what's the inferior extensor retinaculum?
Y-shaped band of deep fascia that froms loop for tendons of extensor digitorum longus and peroneus tertius and then divides into an upper band and a lower band
what's the flexor retinaculum?
deep fascia band that passes b/w medial malleolus and medial surface of calcaneus
what does the flexor retinaculum form?
tarsal tunnel w/ tarsal bones for tibial n, posterior tibial vessels and flexor tendons
what does the flexor retinaculum hold?
3 tendons, blood vessels and a nerve in place deep to it
what mnemonic does this help for: Tom Drives A Very Nervous Horse:
flexor retinaculum: Tibialis posterior, flexor Digitorum longus, posterior tibial Artery and Vein, tibial Nerve, and flexor Hallucis longus
what's tarsal tunnel syndrome?
complex symptom resulting from compression of the tibial n or its medial and lateral plantar branches in the tarsal tunnel
what are the symptoms of tarsal tunnel syndrome?
pain, numbness, tingling sensations on the ankle, heel and sole of the foot
what can cause tarsal tunnel syndrome?
repetitive stress with activities, flat feet, or excess weight
what's the tendo calcaneus (Achilles tendon)?
tendon of insertion of the triceps surae (gastrocnemius and soleus) into the tuberosity of the calcaneus
what does an avulsion/rupture of Achilles tendon cause?
disables triceps surae (gastrocnemius and soleus) muscles
what's the symptom of avulsion/rupture of the Achilles tendon?
patient can't plantar flex the foot
what does forced eversion of the foot cause?
avulses the medial malleolus or ruptures the deltoid ligament
what does forced inversion cause?
avulses the lateral malleolus or tears the lateral collateral (anterior and posterior talofibular and calcaneofibular) ligament
what causes ankle sprain (inversion injury)?
results from rupture of calcaneofibular and talofibular ligaments and a fracture of the lateral malleolus caused by forced inversion of the foot
what's plantar aponeurosis?
thick fascia investing plantar muscles
what is plantar aponeurosis' path?
radiates from the calcaneal tuberosity toward the toes
what does plantar aponeurosis provide attachment for?
provides att to the short flexor muscles of the toes
what are the muscles of the foot on the dorsum?
extensor digitorum brevis, extensor hallucis brevis
what are the muscles on the 1st layer of the sole of the foot?
abductor hallucis, flexor digitorum brevis, abductor digiti minimi
what are the muscles on the 2nd layer of the sole of the foot?
quadratus plantae, lumbricals
what are the muscles on the 3rd layer of the sole of the foot?
flexor hallucis brevis, adductor hallucis, oblique head, transverse head, flexor digiti minimi brevis
what are the muscles on the 4th layer of the sole of the foot?
plantar interossei (3), dorsal interossei (4)
what nn innervate the muscles of the foot?
deep peroneal, medial plantar, lateral plantar
what n innervates the extensor digitorum brevis?
deep peroneal
what n innervates the extensor hallucis brevis muscle?
deep peroneal
what n innervates the abductor hallucis muscle?
medial plantar
what n innervates the flexor digitorum brevis muscle?
medial plantar
what n innervates the abductor digiti minimi muscle?
lateral plantar
what n innervates the quadratus plantae muscle?
lateral plantar
what n innervates the lumbricals muscle?
1st- medial plantar, lateral 3- lateral plantar
what n innervates the flexor hallucis brevis muscle?
medial plantar
what n innervates the adductor hallucis oblique head muscle?
lateral plantar
what n innervates the adductor hallucis transverse head muscle?
lateral plantar
what n innervates the flexor digiti minimi brevis muscle?
lateral plantar
what n innervates the plantar interossei muscle?
lateral plantar
what n innervates the dorsal interossei muscle?
lateral plantar
what muscle extends toes?
extensor digitorum brevis
what muscle extends the big toe?
extensor hallucis brevis
what muscle abducts the big toe?
abductor hallucis
what muscle flexes middle phalanges of lateral four toes?
flexor digitorum brevis
what muscle abducts little toe?
abductor digiti minimi
what muscle aids in flexing toes?
quadratus plantaej
what muscle flexes metatarsophalangeal joints and extends interphalangeal joints?
lumbricals (4)
what muscle flexes the big toe?
flexor hallucis brevis
what muscle adducts the big toe?
adductor hallucis
what muscle flexes the little toe?
flexor digiti minimi brevis
what muscle adducts toes, flexes proximal and extends distal phalanges
plantar interossei (3)
what muscle abducts toes, flexes proximal and extends distal phalanges?
dorsal interossei (4)
what are the arches of the foot?
medial longitudinal, lateral longitudinal, proximal transverse, distal transverse
what is the purpose of the arches of the foot?
supports the body in the erect position and acts as a spring in locomotion
what arch is formed and maintained by the interlocking talus, calcaneus, navicular, cuneiform and 3 medial metatarsal bones?
medial longitudinal arch
what's the keystone of the medial longitudinal arch?
head of talus
where is the head of the talus?
at the summit b/w the sustentaculum tali and the navicular bone
what supports the medial longitudinal arch?
spring ligament and flexor hallucis longus tendon
what is flat foot also called?
pes planus or talipes planus
what is flat foot?
condition of disappearance or collapse of the medial longitudinal arch w/ eversion an dabduction of the forefoot
what does flat foot cause?
greater wear on the inner border of the soles and heels of shoes than on the outer border
what is the result of flat foot?
pain from stretching the plantar muscles and straining the spring ligament and the long and short plantar ligaments
what's pes cavus?
exaggerated height of the medial longitudinal arch of the foot
what arch is formed and maintained by the calcaneus, cuboid bone and lateral 2 metatarsal bones?
lateral longitudinal arch
what's the keystone of the lateral longitudinal arch?
cuboid bone
what suppports the lateral longitudinal arch?
peroneus longus tendon and long and short plantar ligaments
what's the func of the lateral longitudinal arch?
supports the body in the erect position and acts as a spring in locomotion
what arch is formed and maintained by the navicular bone, 3 cuneiform bones, cuboid bone, and the bases of the 5 metatarsal bones of the foot?
transverse arch: proximal (metatarsal)
what supports the transverse arch: proximal (metatarsal)?
peroneus longus tendon
what arch is formed by the heads of the 5 metatarsal bones?
transverse arch: distal
what is the transverse arch: distal maintained by?
transverse head of the adductor hallucis
what does the long plantar (plantar calcaneocuboid) ligament form?
canal for tendon of the peroneus longus
what is the func of the long plantar (plantar calcaneocuboid) ligament ?
supports the lateral side of the longitudinal arch of the foot
what is the func of the short plantar (plantar calcaneocuboid) ligament?
supports lateral longitudinal arch
what's the func of the spring (plantar calcaneonavicular) ligament?
supports talus head and the medial longitudinal arch
why is it called the spring ligament?
b/c it has lots of elastic fibers to give elasticity to the arch and spring to the foot
what supports the spring (plantar calcaneonavicular) ligament?
tibialis posterior tendon
what's another name for clubfoot?
talipes equinovarus
what's clubfoot?
congenital foot deformity: foot is plantarflexed, inverted and adducted
what are all of the forms of clubfoot?
1) foot is plantarflexed, inverted and adducted 2) foot is plantarflexed (equinus) or dorsiflexed (calcaneus) and heel is turned laterally (valgus) or medally (varus) 3) heel is elevated and turned laterally (equinovalgus) or medially (equinovarus) 4) anterior part of foot (forefoot) is elevated and the heel is turned laterally (calcaneovalgus) or medially (calcaneovarus)
what are the ligaments of the ankle joint?
medial (deltoid) ligament, lateral ligament
what plexus does the obturator nerve come from?
lumbar plexus
what n levels does the obturator n come from?
L2, L3, L4
how does the obturator n enter the thigh?
obturator foramen
what does the anterior branch of the obturator n innerv?
adductor longus, adductor brevis, gracilis, and pectineus muscles
what's the result of a damaged obturator n?
weakness of adduction and lateral swinging of limb during walking b/c of unopposed abductors
what plexus does the femoral n come from?
lumbar plexus
what are the branches of the femoral n?
muscular branches, articular branches, cutaneous branches (including anterior femoral cutaneous n and saphenous n)
what's the result of a damaged femoral n?
impaired hip flexion and impaired leg extension resulting from quadriceps femoris paralysis
what plexus does the superior gluteal n come from?
sacral
what n levels does the superior gluteal n come from?
L4, L5, S1
what does the superior gluteal n innerv?
gluteus medius, gluteus minimus, tensor fascia latae, hip joint
what's the result of an injured superior gluteal n?
motor loss, resulting in a weakened abduction of the thigh by the gluteus medius, a disabling gluteus medius limb and gluteal gait.
what plexus does the inferior gluteal n come from?
sacral
what n levels does the inferior gluteal n come from?
L5, S1, S2
what does the inferior gluteal n innerv?
gluteus maximus
what plexus does the posterior femoral cutaneous nerve come from?
sacral
what n levels does the posterior femoral cutaneous n come from?
S1, S2, S3
what does the posterior femoral cutaneous nerve innervate?
skin of buttock, thigh and calf and scrotum or labium majus
what plexus does the sciatic n come from?
sacral
what are the n levels of the sciatic n?
L4, L5, S1, S2, S3
what's the largest n in the body?
sciatic n
what nn does the sciatic n divide into?
divides at popliteal fossa into the tibial n and common peroneal n
what does the sciatic n innerv?
hamstring muscles w/ tibial , except for short head of biceps femoris, which innerv the common peroneal division
what's the result of a damaged sciatic n?
impaired extension at the hip and impared flexion at the knee, loss of dorsiflexion and plantar flexion at the ankle, inversion and eversion of the foot, and peculiar gait b/c of increased flexion at the hip to lift the drooped foot off the ground
what are the n levels of the common peroneal (fibular) nerve?
L4, L5, S1, S2
where is the common peroneal (fibular) n vulnerable to injury?
as it winds around the neck of the fibula
what n does the common peroneal n divide into?
deep peroneal and superficial peroneal.. Also gives rise to the lateral sural cutaneous n
what does the lateral sural cutaneous n innervate?
skin on lateral part of back of leg and recurrent articular branch to the knee joint
what's phantom limb pain?
intermittent or continuous pain perceived as originating in an absent (amputated) limb
how can you get a damaged common peroneal (fibular) n?
result of fracture of head or neck of the fibula b/c it passes behind the head of the fibula and then winds laterally around the neck of the fibula
what's the result of a damaged common peroneal (fibular) n?
foot drop (loss of dorsiflexion), loss of sesation on the dorsum of the foot and lateral aspect of the leg and causes paralysis of all muscles in the anterior and lateral compartments of the leg (dorsiflexor and evertor muscles of the foot)
is the superficial peroneal (fibular) n more or less vulnerable to injury than the common peroneal (fibular) n? why?
superficial is less b/c on the lateral side of the neck of the fibula
what does the superficial peroneal n innervate?
peroneus longus, peroneus brevis, skin on the lateral side of the lower leg and dorsum of the foot
what happens if the superficial peroneal (fibular) n is damaged?
no foot drop, but causes loss of eversion of foot
what happens if the deep peroneal (fibular) n is damaged?
foot drop (loss of dorsiflexion) and high stepping gait
is the deep peroneal (fibular) n more or less vulnerable to injury than the common peroneal (fibular) n? why?
deep less b/c on the lateral side of the neck of the fibula
what does the deep peroneal n descend on?
interosseus membrane
what does the deep peroneal n innerv?
anterior muscles of leg and foot and skin of the contiguous sides of the first and second toes and extensor hallucis brevis and extensor digitorum brevis
what does the medial branch of the deep peroneal n accompany?
dorsalis pedis a
what are the branches of the deep peroneal n and what do they innerv?
lateral- extensor hallucis brevis, extensor digitorum brevis medial- skin on adj sides of the 1st and 2nd toes
what n levels are the tibial n?
L4, L5, S1, S2, S3
what fossa does the tibial n go thru?
popliteal
what branches does the tibial n give rise to?
3 articular branches, muscular branches, medial sural cutaneous n, medial calcaneal branch to the skin of the heel and sole, articular branches to the ankle joint, medial and lateral plantar nerves
what arteries does the tibial n accompany?
3 articular branches accompany medial superior genicular, middle genicular, and medial inferior genicular arteries to the knee joint
how does the tibial n end and where?
ends beneathe the flexor retinaculum by dividing into medial and lateral plantar nn
what's the result of a damaged tibial n?
loss of plantar flexion of foot and impaired inversion from tibialis posterior paralysis, causes difficulty in getting heel off ground and shuffling gait, clawing of toes and secondary loss on the sole of the foot, affecting posture and locomotion
what does the medial plantar n innerv?
abductor hallucis, flexor digitorum brevis common digital branches --> proper digital branches that innerv flexor hallucis brevis and 1st lumbrical and skin of medial 3 and 1/2 toes
what's the smaller of the terminal branches of the tibial n?
lateral plantar
what does the lateral plantar n innerv?
quadratus plantae, abductor digiti minimi superficial branch: innerv flexor digiti minimi deep branch: innerv plantar and dorsal interossei, lateral 3 lumbricals and adductor hallucis
where does the superior gluteal a coe from?
internal iliac a
what does the superior gluteal a supply?
superficial: gluteus maximus deep: gluteus medius and minimus, tensor fascia latae
what a does the inferior gluteal a come from?
internal iliac a
how does the inferior gluteal a enter the buttock?
greater sciatic foramen
how does the superior gluteal a enter the buttock?
greater sciatic foramen
what n does the inferior gluteal a run w/?
posterior femoral cutaneous n
what does the inferior gluteal a supply?
gluteus maximus
lateral rotators of hips
hamstrings (upper part)
hip joint
what does the superior gluteal a anastomose w/?
lateral and medial circumflex a
inferior gluteal aa
what does the inferior gluteal a anastomose w/?
cruciate anastomosis: anastomoses w/ superior gluteal, internal pudendal and obturator a
what does the obturator a come from?
internal iliac a in the pelvis
what hole does it pass thru?
obturator foramen
what are the branches of the obturator?
anterior --> muscular branches
posterior --> acetabular branch
how does the obturator a enter the hip joint?
via the acetabular branch that goes thru the acetabular notch, ramifies in the acetabular fossa and sends an artery to the head of the femur
what's the significance of the artery to the head of the femur?
important source of blood to the femoral head in kids
may/may not persist in adults
may be insufficient to sustain viability of femoral head --> ischemic necrosis
what's the corona mortis?
vascular anastomoses b/w the obturator and external iliac systems
give specific ex. of corona mortis:
vascular anastomosis b/w pubic branches of the obturator a and of external iliac (inferior epigastric) a is called corona mortis b/c these vessels in retropubic area are hard to be distinguished and can be injured in groin or pubic surgery
what happens if corona mortis is injured?
massive, uncontrolled bleeding
how can surgeons prevent a bleeding corona mortis?
since venous conn is more probable than an arterial one, if dealing w/ inguinal and femoral hernias, surgeons should avoid venous bleeding and need to be aware of these anastomoses and their close proximity to the femoral ring
what's the clinical significance of an aberrant obturator a?
it may arise from the external iliac or inferior epigastric a and is vulnerable during surgical repair of a femoral hernia
where does the femoral a come from?
external iliac a
how can you find femoral a?
palpable pulsation that can be felt inferior to midpoint of the inguinal ligament
why is the femoral a vulnerable to injury?
it's relatively superficial in the femoral triangle
what are the branches of the femoral a?
superficial epigastric a
superficial circumflex iliac a
superficial external pudendal a
deep external pudendal a
profunda femoris (deep femoral) a
medial femoral circumflex a
lateral femoral circumflex a
descending genicular a
what a emerges from saphenous ring?
superficial external pudendal a
what a runs toward umbilicus?
superficial epigastric a
which a runs laterally almost parallel w/ inguinal ligament?
superficial circumflex iliac a
which a runs medially over the spermatic cord / round ligament of the uterus and sends inguinal branches and anterior scrotal (or labial) branches?
superficial external pudendal a
what a is distributed to the skin of the perineum, scrotum or labium majus?
deep external pudendal a
what a gives rise to the medial and lateral femoral circumflex and muscular branches?
profunda femoris (deep femoral) a
what does the profunda femoria (deep femoral) a supply?
in adductor canal, four perforating arteries that supply adductor magnus and hamstring muscles
1st perforating a sends an ascending branch, which joins the cruciate anastomosis of the buttock
what does the medial femoral circumflex a arise from?
femoral artery
profunda femoris a
what branches does the medial femoral circumflex a give rise to?
muscular branches and acetabular branch to the hip joint.. divides into ascending brach, which anastomoses w/ superior and inferior gluteal a branches and a transverse branch which joins cruciate anastomosis
what's the clinical sig of the medial femoral circumflex a?
its branches run thru the neck to reach the head and it supplies most of the blood to the neck and head of the femur except for a small proximal part that gets blood from a branch of the obturator a
what's the cruciate anastomosis of the buttock formed by?
ascending branch of the 1st perforating a, inferior gluteal a, and transverse branches of the medial and lateral femoral circumflex aa
what can the cruciate anastomosis bypass?
obstruction of the external iliac or femoral a
what does the lateral femoral circumflex a arise from?
femoral or profunda femoris a
what branches does the lateral femoral circumflex a divide into?
ascending branch
transverse branch
descending branch
what does the ascending branch of the lateral femoral circumflex a do?
forms vascular circle w/ branches of the medial femoral circumflex a around the femoral neck and also anastomoses w/ the superior gluteal a
what does the transverse branch of the lateral femoral circumflex a do?
joins cruciate anastomosis
what does the descending branch of the lateral femoral circumflex a do?
anastomoses w/ the superior lateral genicular branch of the popliteal a
what a does the descending genicular a arise from?
femoral a in the adductor canal before passing thru the aductor hiatus
what does the descending genicular artery divide ino?
articular branch- enters anastomosis around knee
saphenous branch- supplies superficial tissue and skin on medial side of knee
what's the position of the femoral a?
easily exposed and cannulated at the base of the femoral triangle just inferior to the midpoint of the inguinal ligament
what's the clinical significance of the femoral a?
it's location makes it vulnerable to injury by laceration and gunshot wounds
what's the result of a ligated femoral a?
cruciate anastomosis supplies blood to the thigh and leg
what a does the popliteal a come from?
femoral a at the adductor hiatus and runs through the popliteal fossa
where can you feel the popliteal a?
popliteal fossa
how can the popliteal a be injured?
femur fracture
dislocation of knee joint
how does the popliteal a terminate?
divides into anterior/posterior tibial aa
what are the aa that the popliteal a gives rise to?
5 genicular aa:
superior lateral genicular a
superior medial genicular a
inferior lateral genicular a
inferior medial genicular a
middle genicular a
what's the result of a popliteal aneurysm?
edema and pain in the popliteal fossa
how can a popliteal aneurysm arise?
if femoral a must be ligated, blood can bypass occlusion thru genicular anastomoses and reach popliteal a distal to ligation
what a does the posterior tibial a come from?
popliteal a
what accompanies posterior tibial a?
2 venae comitantes and tibial n on post surface of the tibialis posterior muscle
what aa does the posterior tibial a give rise to?
peroneal (fibular) a
posterior lateral malleolar branch
posterior medial malleolar, perforating, and muscular branches
terminates: medial and lateral plantar aa
what does the peroneal (fibular) a give rise to?
lateral muscles in the posterior compartment
what does the medial plantar a supply?
superficial: big toe
deep branch: 3 superficial digital branches
what's the diff b/w medial and plantar a in size?
medial = smaller
what does the lateral plantar a run w/?
lateral plantar n
what does the lateral plantar a form?
plantar arch by joining deep plantar branch of dorsalis pedis a
what does the plantar arch give rise to?
4 plantar metatarsal aa
what does the anterior tibial a come from?
popliteal a
how does the anterior tibial a enter the anterior compartment?
by passing thru gap b/w tibia and fibula at upper end of interosseus membrane
what does anterior tibial a descend w/?
deep peroneal vessels
what a does the anterior tibial a give rise to?
anterior tibial recurrent a
anterior medial malleolar aa
anterior lateral malleolar aa
what gives rise to the dorsalis pedia a?
anterior tibial a
what aa does the dorsalis pedia a give rise to?
medial tarsal, lateral tarsal, arcuate and 1st dorsal metatarsal aa
what does the arcuate a give rise to?
2nd, 3rd, 4th dorsal metatarsal aa
how does the dorsalis pedia a terminate?
as the deep plantar a
what forms the plantar arch?
joining of deep plantar a and lateral plantar a
where can you feel the pulse in the dorsalis pedis a?
pulsation on the navicular and cuneiform bones lateral to the tendon of flexor hallucis longus
what are the deep veins of the leg?
venae comitantes to the anterior and posterior tibial aa
what v does the popliteal v receive?
small saphenous vein and vv corresponding to popliteal a branches
what does the popliteal v accompany?
popliteal a
what does the femoral v accompany?
femoral a as continuation of popliteal v
what v does the femoral v receive?
great saphenous v and tributaries from branches of femoral a
where's the femoral v?
lies immediately medial to femoral a, which can be identified by pulsation
what happens when the femoral v is cannulated?
permits administration of fluids or catheters, which are passed superiorly thru external and common iliac vv into the inferior vena cava and then right atrium of the heart
what are the mvmnts of the hip joint?
flexion
extension
adduction
abduction
medial rotation
lateral rotation
what are the mvmnts of the knee joint?
flexion
extension
medial rotation
lateral rotation
what are the mvmnts of the ankle joint?
dorsiflexion
plantar flexion
what are the mvmnts of the intertarsal joint (talocalcaneal, transverse tarsal joint) ?
inversion
eversion
what are the mvmnts of the metatarsophalangeal joint (ellipsoid joint)?
flexion
extension
what are the mvmnts of the interphalangeal joint (hinge joint)?
flexion
extension
what innerv muscles of the anterior compartment of the thigh?
femoral n
what innerv muscles of the medial compartment of the thigh?
obturator n
exceptions:
adductor magnus- obturator and tibial nn
pectineus- femoral and obturator nn
what innerv muscles of the posterior compartment of the thigh?
tibial part of sciatic n
what innerv muscles of the lateral compartment of the thigh?
inferior gluteal n
superior gluteal n
n to piriformis
n to obturator internus
n to quadratus femoris
what innev the muscles of the anterior compartment of the leg?
deep peroneal n
what innerv the muscles of the lateral compartment of the leg?
superficial peroneal n
what innerv muscles of the posterior compartment of the leg?
tibial n
exceptions:
short head of biceps femoris: common peroneal part of sciatic n
adductor magnus- tibial part of sciatic n and obturator n
what muscles are involved in dorsiflexion?
anterior tibialis
extensor digitorum longus
extensor hallucis longus
peroneus tertius
what muscles are involved in plantar flexion?
triceps surae
plantaris
posterior tibialis
peroneus longus
peroneus brevis
flexor digitorum longus
flexor hallucis longus
what muscles are involved in inversion of the foot?
tibialis posterior
tibialis anterior
triceps surae
extensor hallucis longus
what muscles are involved in eversion of the foot?
peroneus longus
peroneus brevis
peroneus tertius
extensor digitorum longus