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Kin 173- knee muscles
origin, insurtion, action, innervation
9
Other
Undergraduate 1
03/08/2009

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Cards

Term
Rectus Femoris
Definition
O: anterior inferior iliac spine of ilium and superior margin of acetabulum
I: superior aspect of patella and patellar tendon to tibial tuberosity
A: hip flexion; knee extension
I: femoral nerve (L2-L4)
Term
Vastus Intermedius
Definition
O: upper 2/3 of anterior surface of femur
I: upper border of patella and patellar tendon to tibial tuberosity
A: knee extension
I: femoral nerve (L2-L4)
Term
Vastus Lateralis
Definition
O: intertrochanteric line, anterior and inferior borders of the greater trochanter, gluteal tuberosity, upper half of linea aspera and entire lateral intermuscular septum
I: lateral border of patella and patellar tendon to tibial tuberosity
A: knee extension
I: femoral nerve (L2-L4)
Term
Vastus Medialis
Definition
O: whole length of linea aspera and medial condyloid ridge
I: medial half of upper border of patella and patellar tendon to tibial tuberosity
A: knee extension
I: femoral nerve (L2-L4)
Term
Biceps Femoris - long head
Definition
O: ischial tuberosity; distal half of linea aspera and lateral condyloid ridge
I: lateral condyle of tibia and head of fibula
A: knee flexion; hip extension and external rotation; external rotation of flexed knee
I: sciatic nerve – tibial division (S1-S3)
Term
Biceps Femoris - short head
Definition
O: lower half of linea aspera and lateral condyloid ridge
I: head of fibula
A: knee flexion; hip extension and external rotation; external rotation of flexed knee
I: sciatic nerve – peroneal division (L5-S2)
Term
Popliteus
Definition
O: posterior surface of lateral femoral condyle
I: upper posteromedial surface of tibia
A: knee flexion and internal rotation of tibia as knee flexes
I: tibial nerve (L5, S1)
Term
Semimembranosus
Definition
O: ischial tuberosity
I: posteromedial surface of medial tibial condyle
A: knee flexion; hip extension and internal rotation; internal rotation of flexed knee
I: sciatic nerve – tibial division (L5-S2)
Term
Semitendinosus
Definition
O: ischial tuberosity
I: anteromedial surface of tibia just below condyle
A: knee flexion; hip extension and internal rotation; internal rotation of flexed knee
I: sciatic nerve - tibial division (L5-S2)
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