Posterior Thigh POINAS

Question 1

Semitendinosus MA

Answer 1

• Hip extension
• Knee flexion
• Knee medial rotation when flexed

When hip and knee are flexed (as when sitting) can extend trunk at hip (to rise)

Question 2

Semitendinosus PA

Answer 2

ischial tuberosity

Question 3

Semitendinosus DA

Answer 3

Pes anserine of tibia

Question 4

Semitendinosus N

Answer 4

Tibial division of sciatic nerve L5, S1, S2

Question 5

Semimembranosus MA

Answer 5

• Hip extension
• Knee flexion
• Knee medial rotation when flexed

When hip and knee are flexed (as when sitting) can extend trunk at hip (to rise)

Question 6

Semimembranosus PA

Answer 6

Ischial tuberosity

Question 7

Semimembranosus DA

Answer 7

Posterior medial tibial condyle

• Reflected attachment forms oblique popliteal ligament (to lateral femoral condyle)

Question 8

Semimembrannosus N

Answer 8

Tibial division of sciatic nerve L5, S1, S2

Question 9

Biceps Femoris MA

Answer 9

Knee flexion
knee lateral rotation when flexed

Long head only:
Hip extension

Question 10

Biceps Femoris PA

Answer 10

Long head: ischial tuberosity

Short head: Linea aspera, Lateral supracondylar line

Question 11

Biceps Femoris DA

Answer 11

Lateral side of fibular head (Tendon is split at this site by fibular collateral ligament (LCL) of knee)

Question 12

Biceps Femoris N

Answer 12

Long head: Tibial division os sciatic nerve L5, S1*, S2

Short head: Common fib. division of sciatic nerve L5, S1*, S2