Flexors of the Knee

Question 1

Biceps Femoris

Answer 1

O: ischial tuberosity of the innominate bone
I: head of fibula
N: sciatic nerve L5, S1, S2
A: extension of the hip and flexion of the knee joint

Question 2

Semimembranosus

Answer 2

O: ischial tuberosity of the innominate bone
I: posteromedial surface of medial condyle of the tibia
N: Sciatic nerve L5, S1, S2
A: Extension of the hip and Flexion of the knee joint

Question 3

Semitendinosus

Answer 3

O: ischial tuberosity of the innominate bone
I: medial surface of medial condyle of tibia
N: Sciatic nerve L5, S1, S2
A: Extension of the hip and flexion of the knee joint

Question 4

Gastrocnemius

Answer 4

O: medial and lateral condyles of the femur
I: via the achilles tendon into the posterior surface od the calcaneus
N: Tibial nerve S1, S2
A: plantarflexion of the ankle joint. flexion of the knee joint.

Question 5

Sartorius

Answer 5

O: Anterior Superior iliac spine (ASIS) of the innominate bone
I: medial side of the body of the tibia
N: femoral nerve L2, L3
A: flexion of the hip & knee; lateral rotation and abduction of the thigh; medial rotation of the tibia on the femur

Question 6

Gracilis

Answer 6

O: front of the body of the pubis, inferior pubic and ischial rami of the innominate bone
I: medial surface of the body of the tibia
N: Obturator nerve L2, L3
A: adduction of the thigh & flexion of the knee joint