Muscles Of Posterior Thigh(extensors Of Hip)

Question 0

Innervation of semi tendinous

Answer 0

Tibial division of sciatic nerve

Question 1

O and I of semi tendinous

Answer 1

O: ischial tuberosity
I: medial surface of superior part of tibia

Question 2

Action of semitendinosuss and semimembranosus

Answer 2

Extend the thigh, flex the knee and rotates it medially when the knee is in flexion
When the thigh and leg are flexed, these muscles can extend trunk

Question 3

O and I for semimembranosus

Answer 3

O: ischial tuberosity
I: posterior part of medial condyle if tibia, reflected attachment firms oblique popliteal ligament (zoo lateral femoral condyle)

Question 4

Innervation for semimembranosus

Answer 4

Tibial division of sciatic nerve

Question 5

Biceps femoris o and I

Answer 5

Long head-
O: ischial tuberosity
Short head:
Linea aspera and lateral supra condylar line of femur

I: lateral side of head of fibula, tendon splits at this site by fibulae collateral ligament of knee

Question 6

Innervation if biceps femoris

Answer 6

Short head : common fibula division of sciatic nerve

Long head: tibial division of sciatic nerve

Question 7

Action of biceps femoris

Answer 7

Flexes the leg and rotates it laterally when knee is flexed 
Extends thigh (eg accelerating mass during first step of gait)