Muscles of the Lower Extremity: Posterior Compartment of the Thigh

Question 1

Semimembranosus Proximal Attachment

Answer 1

Ischial tuberosity

Question 2

Semimembranosus Distal Attachment

Answer 2

Posterior surface of the medial condyle of the tibia

Question 3

Semimembranosus Innervation

Answer 3

Sciatic n. [L5,S1,S2]

Question 4

Semimembranosus Action

Answer 4

Flexes the knee
Extends the hip
Medially rotates the tibia
Assists with:
-Medial rotation of the hip

Question 5

Semitendinosus Proximal Attachment

Answer 5

Ischial tuberosity

Question 6

Semitendinosus Distal Attachment

Answer 6

Medial surface of tibia below the tibial condyle (Pes anserinus)

Question 7

Semitendinosus Innervation

Answer 7

Sciatic n. [L5,S1,S2]

Question 8

Semitendinosus Action

Answer 8

Flexes the knee
Extends the hip
Medially rotates the tibia
Assists with:
-Medial rotation of the hip

Question 9

Biceps Femoris (Long Head) Proximal Attachment

Answer 9

Ischial tuberosity

Question 10

Biceps Femoris (Long Head) Distal Attachment

Answer 10

Head of the fibula and lateral condyle of the tibia

Question 11

Biceps Femoris (Long Head) Innervation

Answer 11

Sciatic n. [L5,*S1,S2]

Question 12

Biceps Femoris (Long Head) Action

Answer 12

Flexes the knee
Extends the hip
Laterally rotates the tibia
Assists with:
-Lateral rotation of the hip

Question 13

Biceps Femoris (Short Head) Proximal Attachment

Answer 13

Lateral lip of the linea aspera and lateral supracondylar line

Question 14

Biceps Femoris (Short Head) Distal Attachment

Answer 14

Head of the fibula and lateral condyle of the tibia

Question 15

Biceps Femoris (Short Head) Innervation

Answer 15

Sciatic n. [L5,*S1,S2]

Question 16

Biceps Femoris (Short Head) Action

Answer 16

Flexes the knee

Laterally rotates the tibia