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50 Cards in this Set

  • Front
  • Back
origin
more proximal and less movable
insertion
more distal and more movable
endomysium
surrounds an individual fiber
perimysium
surrounds bundle of fibers (fascicle)
epimysium
surround whole muscle belly (muscle fascia)
atrophy
shrinking of a muscle bc of a nerve interruption
posterior gluteal muscles
gluteus maximus
origin + insertion
largest muscle body

origin=ilium and lower part of sacrum/coccyx (sacrotuberous ligament)

insertion= gluteal tuberosity and IT tract
posterior gluteal muscles
gluteus maximus
action + innervation
extension and rotation of hip/ helps stabilize knee bc it goes into IT band


innervation=inferior gluteal nerve + artery
posterior gluteal muscles
gluteus medius + minimus
origin+ insertion
origin= ilium
insertion= greater trochanter of femur
posterior gluteal muscles
gluteus medius + minimus

action + innervation
action= abduct hip
innervation= superior gluteal nerve + artery
posterior gluteal muscles
tensor fasciae latae
origin+ insertion
origin= ilium
insertion= IT band
posterior gluteal muscles
tensor fasciae latae
action + innervation
action= flex + abduct hip and stabilized knee bc it goes into IT band

innervation= superior gluteal nerve + artery
deep muscles of gluteal region
action
lateral rotation of hip
deep muscles of gluteal region
piriformis
origin + insertion
key to finding sciatic nerve

origin= sacrum
insertion= greater trochanter of femur
deep muscles of gluteal region
obturator internus
origin + insertion
origin= obturator foramen
insertion= greater trochanter of femur
deep muscles of gluteal region
gamellus superior
origin + insertion
origin= ischial spine
insertion= greater trochanter of femur
deep muscles of gluteal region
gammellus inferior
origin + insertion
origin= ischial tuberosity
insertion= greater trochanter of femur
deep muscles of gluteal region
quadratus femoris
origin + insertion
origin= ischial tuberosity
insertion= greater trochanter of femur
deep muscles of gluteal region
obturator externus
origin + insertion
origin= obturator foramen
insertion= trochanteric fossa
deep muscles of gluteal region
innervation of all
sacral plexus- back door nerves
red carpet muscles
some deep muscles of gluteal region--> obturator internus
gamellus superior + inferior
quadratus femoris

sciatic nerve runs over the red carpet muscles
anterior hip muscles (iliac region)

psoas major
origin+insertion
origin= lumbar vertebrae
insertion= lesser trochanter of femur
anterior hip muscles (iliac region)
psoas major
action+ innervation
action= flexes hip
innervation- lumbar nerves
L1-3
anterior hip muscles (iliac region)

iliacus
origin+insertion
origin= iliac fossa
insertion= lesser trochanter of femur
anterior hip muscles (iliac region)
iliacus
action+ innervation
action= flexes hip
innervation= femoral nerve
anterior hip muscles (iliac region)
iliopsoas
formed when the psoas major and iliacus join after passing the inguinal ligament
Anterior femoral muscles
action + innervation
action= extend knee (except sartorius which flexes hip + knee)

innervation= femoral nerve + artery (lumbar plexus front door)
Anterior femoral muscles
sartorius
origin + insertion
origin= ASIS anterior superior iliac spine

insertion= tibia
ALSO
runs diagnal, is longest muscle in body, called talus muscles
Anterior femoral muscles
rectus femoris
origin + insertion
runs straight in front of hip joint

origin= AIIS
insertion= tibial tuberosity
Anterior femoral muscles
vastus lateralis
origin + insertion
origin= linea aspera
insertion= tibial tuberosity

vary large in runners, good for intramuscular injection
Anterior femoral muscles
vastus medialis
origin + insertion
origin= linea aspera
insertion= tibial tuberosity

muscle fibers run horizontal, helps stabilize knee joint
Anterior femoral muscles
vastus intermedius
origin + insertion
origin= upper femur
insertion= tibial tuberosity
Anterior femoral muscles
Quadriceps
rectus femoris, vastus l. m. i.

these muscles collectively form the quadriceps tendon which encases the patella--> pass the patella the tendons name changes to patellar ligament
Medial femoral muscles
action + innervation
action= adduct hip
innervation= oburator nerve + artery
Medial femoral muscles
gracillus
origin + insertion
origin= pubic bone
insertion= tibia
pectineus
origin + insertion
origin= pubis
insertion= femur

ALSO HAS ADDITIONAL INNERVATION- femoral nerve
Medial femoral muscles
adductor longus
origin + insertion
origin= pubic bone
insertion= linea aspera
Medial femoral muscles
adductor brevis
origin + insertion
origin= pubic ramus
insertion= femur
Medial femoral muscles
adductor magnus
origin + insertion
origin= pubis ramus + ischium
insertion= linea aspera

ALSO HAS ADDITIONAL INNERVATION- tibeal nerve
Medial femoral muscles
adductor hiatus
opening in the tendon of insertion of the adductor magnus

femoral artery passes through the hiatus/ then called popliteal artery
Posterior femoral muscles
HAMSTRINGS
action + innervation
action= extend hip, flex knee
innervation= sciatic nerve (tibial branch of it) EXCEPT short head of biceps femoris

hamstrings
Posterior femoral muscles
biceps femoris
origin + insertion
(1) long head

origin= ischial tuberosity
insertion=fibula

(2) short head

origin= linea aspera
insertion= fibula
INNERVATION= common fibular (peroneal nerve)
Posterior femoral muscles
semitendinosous
origin + insertion
origin= ischial tuberosity
insertion= tibia
Posterior femoral muscles
semimembranosous
origin + insertion
origin= ischial tuberosity
insertion= tibia
Clinical correlations
os coxae= pubic rami most suceptible to fracture
Clinical correlations
femur
(1) fracture of neck common in older patients bc of osteoporosis or fall

(2) osteomyelitis= inflammation of bone marrow due to bacterial infection
Clinical correlations
patella
chondromalatia patellae= runners knee when the patella tracks laterally causing pain
Clinical correlations
tibia
most common long bone to be fractured
Clinical correlations
fibula
source of bone for grafting
non weight bearing
Trendelenburg Sign
abnormal downward pelvic tilt bc the gluteus medius muscles are not contracting alternately like they are supposed to

(gluteal gate/waddle)