Muscles of Post Thigh

Question 0

semimembranous

Answer 0

O: ischial tuberosity
I: post part of medial condyle of tibia
N: tibial division of sciatic nerve L5, S1, S2
A: flexes leg and rotates laterally while leg is flexed, extends thigh

Question 1

semitendinous

Answer 1

O: ischial tuberosity
I: medial surface of superior part of tibia
N: tibial division of sciatic nerve L5, S1, S2
A: extend thigh, flex leg and rotate medially when knee is flexed,
extends trunk when thigh and leg are flexed

Question 2

biceps femoris long head

Answer 2

O: ischial tuberosity
I: lat side of head of fibula, tendon splits here by LCL
N: tibial division of sciatic nerve L5, S1, S2
A: flexes leg and laterally rotates it when its flexed, extends thigh

Question 3

biceps femoris short head

Answer 3

O: linea aspera and lateral supracondylar line of femur
I: lateral side of head of fibula, tendon splits here by LCL
N: common fibular division of sciatic nerve L5, S1, S2
A: flexes leg and laterally rotates it when its flexed, extends thigh