Posterior Thigh Muscles

Question 1

Name 3 posterior thigh muscles

Answer 1

• Semitendinous
• Semimembranosus
• Biceps Femoris ( 2 head, long and short)

Question 2

Semitendinous

PA
DA
N
A

Answer 2

Has cord like tendon which begins about 2/3 of the way down the thigh

• Ischial tuberosity
• Medial part of the superior surface of the tibia (as part of the pes anserinus)
• Tibial division of the sciatic nerve
• Extends thigh, flex leg and rotates it medially when the knee is flexed, when the thighs are flexed it can extend the trunk

Question 3

Semimembranosus

PA
DA
N
A

Answer 3

• Ischial tuberosity
• Posterior aspect of the medial tibial condyle, tendon reflects as onlique popliteal ligamanent to attach to lateral femoral condyle.
• Tibial division of sciatic nerve
• Extends the thighl, flex leg and rotates it medially when the knee is flexed, when the thighs are flexed it can extend the trunk.

Question 4

Biceps Femoris

PA
DA
N
A

Answer 4

Long head crosses both hip and knee
Short head only the knee

Long head - Ischial tuberosity
Lateral side of the fibular head
Long head - tibial division of sciatic nerve

Shorty head - linea aspera and lateral supracondylar line of the femur.
- Lateral side of the fibular head
Short head - common fibular division of sciatic nerve

• Extends thigh (long head), flexs leg and laterally rotates when the knee is flexed (both)