Muscles Of The Thigh/ Knee

Front 1

Muscles of the thigh facts

Back 1

dominant in knee flexion/extension.
hip flexion and extension.
many 2 joint muscles that act on the hip

Front 2

2 joint muscles

Back 2

rectus femoris, gracilis, satorius, semitendonosis, semimembranosis, bicep femoris

Front 3

2 joint muscles facts

Back 3

efficient for locomotion (used at the middle of ROM)
- cannot (typically) stretch enough for a full range of motion at both joints at the same time.

Front 4

2 joint muscle facts cont.

Back 4

cannot typically produce enough power to produce complete movement at both joints at the same time, very difficult when flexing at the hip and extending at the knee at the same time. dancers, gymnasts, kickers

Front 5

facts about the knee

Back 5

hinge joint.
- articulation of femur, tibia, and patella.
- flexion and extension
- crucial support by ligaments
- structurally weak without significant musculature

Front 6

ligaments of knee

Back 6

MCL, LCL, ACL, PCL medial meniscus, lateral meniscus

Front 7

Q angle facts

Back 7

named for the quadracep angle. - the angle is between thelong axis of the emur and the line of pull of the patellar tendon. the larger the q angle, the larger the risk of injury

Front 8

anterior thigh 5 muscles joint crossings

Back 8

2 cross 2 joints, 3 cross 1 joint

Front 9

sartorius facts

Back 9

2 joint muscle, longest muscle, long, parallet for arrangement of speed,runs lateral to medial

Front 10

sartorius tripod member

Back 10

claims ilium on the anterior superior iliac spine. Postural alignment is the tripod muscles function. viewed medially, is anterior.

Front 11

sartorius o/i/a

Back 11

o: anterior superior iliac spine (ASIS)
i:medial condyle tibia
a:flexion of the hip, some external rotation
likes to stabilize the weightline between the trunk and the knee

Front 12

rectus femoris facts

Back 12

quadracep group muscle. all have common insertion and common tendon. patellar tendon engulfs the patella and inserts on the tibial tuberosity. only 2 joint muscle of the 4. bipennate = power

Front 13

rectus femoris o/i/a

Back 13

o:anterior inferior iliac spine
i:common patellar tendon to tibial tuberosity
a: hip flexion and knee extension

Front 14

vastus lateralis facts

Back 14

unipennate for converging with central intermedius tendon configured for power!

Front 15

vastus lateralis o/i/a

Back 15

o: lateral lip of linea aspera (posterior origin)
i: common patellar tendon to tibial tuberosity
a: knee extension only

Front 16

vastus intermedius facts

Back 16

unpalpable. deep to rectus femoris. largely tendinous with small bulge at origin

Front 17

vastus intermedius o/i/a

Back 17

o: lateral lip of linea aspera and anterior surface of femur. (posterior origin)
i: common patellar tendon to tibial tuberosity
a: knee extension only

Front 18

vastus medialis facts

Back 18

palpate at medial distal anterior thigh. unipennate - powerful ability with fibers running opposite to lateralis forming V at the intermedius tendon. most active of the 3 vastus mucles throughout the largest range of motion

Front 19

vastus medialis o/i/a

Back 19

o:lateral lip of linea aspera and medial supracondylar ridge (posterior origin)
i:common patellar tendon to tibial tuberosity
a: knee extension only

Front 20

Posterior thigh

Back 20

3 muscles, all 2 joint

Front 21

bicep femoris facts

Back 21

2 headed stringy muscle of posterior compartment of thigh (hamstring). 2 joint muscle with long head crossing the hip only. palpate at the popliteal fossa on the lateral aspect of the leg

Front 22

bicep femoris o/i/a

Back 22

o: ischial tuberosity and lower linea aspera
i:lateral tibial condyle and head of fibula
a:knee flexion and hip extension

Front 23

semitendonosis facts tripod

Back 23

2 joint tripod muscle claims the ischuim on the tuberosity. postural alignment is the tripod muscle function. takes the posterior side when viewed at medially,sartorius takes anterior.

Front 24

semitendonosis o/i/a

Back 24

o:Ischial tuberosity
i:medial upper tibial surface
a:hip extension and knee flexion

Front 25

semimembranosis facts

Back 25

2 joint muscle, lies deep to the semitendonosis, palpate on either side due to wider fibers.

Front 26

semimembranosis o/i/a

Back 26

o:ischial tuberosity.
i:medial condyle of tibia
a: knee flexion and hip extension

Front 27

Medial Thigh adductors facts

Back 27

5 muscles, 4- hip only, 1- hip and knee crossing

Front 28

pectineus facts

Back 28

first of medial compartment of thigh,only adductor not named for actions,but named for attachment. short thich quadrilateral muscle with good angle of pull for hip flexion and adduction

Front 29

pectineus o/i/a

Back 29

o:ilioPECTINEAL eminence
i:PECTINEAL line
a: hip flexion and adduction, slight outward rotation

Front 30

adductor brevis facts

Back 30

most superior and shortest with fibers at an angle for hip flexion with pectineus and adduction

Front 31

adductor brevis o/i/a

Back 31

o:inferior ramus of pubis
i:spiral line and superior linea aspera.
a:adduction and flexion at the hip

Front 32

adductor longus femoral triangle

Back 32

forms the femoral triangle with sartorius and inguinal ligament to locate the femoral artery pressure point for bleeding in the lower extremity

Front 33

adductor longus facts

Back 33

broad fan shape fiber arrangement, vulnerable in dancers and gymnasts during dynamic splits

Front 34

adductor longus o/i/a

Back 34

o:pubic crest
i:medial lip of linea aspera
a: hip adduction and flexion

Front 35

adductor magnus facts

Back 35

largest muscle of medial thigh.

Front 36

adductor magnus o/i/a

Back 36

o:inferior ramus of pubis
i:extensive insertion along the posterior femur, h-greater trochanter, h-linea aspera, h-adductor tubercle
a: strong adduction, weak flexion

Front 37

gracilis tripod facts

Back 37

tripod muscle claiming the crest of the pubis near symphysis. postural alignment is the tripod muscles functio. the gracilis is medial, satorius is anterior, and the semitendonosis is posterior when viewed at medial knee.

Front 38

gracilis o/i/a

Back 38

o:pubic crest
i:upper, medial tibial surface
a: hip adduction and flexion

Front 39

tripod muscles facts

Back 39

as a trio, they adjust weight line from the hip to the knee
1)ilium- sartorius
2)pubis - gracilis
3)Ischium- semitendonosis

Front 40

tripod insertion

Back 40

tendons of gracilis, semimembranosus, semitendinosus,SARTORIUS.