Knee Flexors Flashcards
Name the knee flexors.
Hamstrings, Gastrocnemius, Gracilis, Sartorius
What muscles make up the hamstrings?
Biceps femoris semimembranosus & semitendinosus.
Biceps femoris origin.
Ischial tuberosity of the innominate
Biceps femoris insertion.
Head of fibula.
Biceps femoris nerve supply.
Sciatic nerve L5, S1, 2.
Biceps femoris actions.
Hip extension and knee flexion.
Biceps femoris function.
stepping
Semimembranosus origin.
Ischial tuberosity of the innominate
Semimembranosus insertion.
Posteromedial surface of medial condyle of tibia.
Semimembranosus nerve supply.
Sciatic nerve L5, S1, 2.
Semimembranous actions.
Extension of the hip and flexion of the knee joint.
Semimembranousus function
Stepping
Semitendinosus origin.
Ischial tuberosity of the innominate
Semitendinosus insertion.
Medial surface of the medial condyle of tibia.
Semitendinosus nerve supply.
Sciatic nerve L5, S1, 2.
Semitendinosus action.
Hip extension and knee flexion.
Semitendinosus function.
Stepping
Gastrocnemius origin.
Medial and lateral condyles of the femur.
Gastrocnemius insertion.
Via the Achilles tendon into the posterior surface of the calcaneus.
Gastrocnemius nerve supply.
Tibial nerve S1, 2.
Gastrocnemius action.
Plantar flexion of the ankle, flexion of the knee.
Gastrocnemius function.
Stepping.
Sartorius origin.
Anterior superior iliac spine.
Sartorius insertion.
Medial side of the body of the tibia.
Sartorius nerve supply.
femoral nerve L2, 3.
Sartorius action.
Hip and knee flexion. lateral rotation and abduction of the thigh. medial rotation of the tibia on the femur.
Gracilis origin.
Front of the body of the pubis inferior pubic and ischial rami of the innominate.
Gracilis insertion.
Medial surface of the tibial body.
Gracilis nerve supply.
Obturator nerve L2, 3.
Gracilis action.
Thigh adduction Knee flexion.
Gracilis function.
Stepping.
