Posterior Thigh Muscles

Question 1

Semitendinosus origin and insertion

Answer 1

Origin- Ischial Tuberosity

Insertion- Proximal, medial shaft of the Tibia at pes anserinus tendon

Question 2

Semitendinosus Action

Answer 2

Flex the knee; medially rotate the flexed knee; extend the hip; assist to medially rotate the hip; tilt the pelvis posteriorly

Question 3

Semimembranosus origin and insertion

Answer 3

Origin- Ischial tuberosity

Insertion- Posterior aspect of medial condylarths of Tibia

Question 4

Semimembranosus Action

Answer 4

Flex the knee; medially rotate the flexed knee, extend the hip; assist to medially rotate the hip; tilt the pelvis posteriorly

Question 5

Biceps Femoris origin and insertion

Answer 5

Origin- Long head: Ischial Tuberosity
Short head: lateral lip of linea aspera

Insertion- Head of Fibula

Question 6

Biceps Femoris Action

Answer 6

Flex the knee; laterally rotate the flexed knee

Long head: extend the hip; assist to laterally rotate the hip