Posterior Thigh and Popliteal Fossa

Question 1

Hamstrings: Origin

Answer 1

Ischial tuberosity (except short head of biceps femoris)

Question 2

Hamstrings: Innervation

Answer 2

Tibial division of sciatic nerve (which includes the hamstring portion of adductor magnus)

except short head of biceps femoris (common fibular portion)

Question 3

Hamstrings: Functions

Answer 3

• Thigh extension, except short head of biceps femoris

- Leg flexion (all four)

Question 4

Semitendinosus M. : Function

Answer 4

• Extend thigh; flex leg (medial rotate)

Question 5

Semitendinosus M. : Innervation

Answer 5

Tibial division of sciatic nerve

Question 6

Semitendinosus M. : Origin

Answer 6

Ischial tuberosity

Question 7

Semitendinosus M. : Insertion

Answer 7

Medial surface of superior aspect of tibia (at the pes anserinus)

Question 8

Semimembranosus M. : Functions

Answer 8

• Extend thigh

- Flex leg

Question 9

Semimembranosus M. : Innervation

Answer 9

Tibial division of sciatic nerve

Question 10

Semimembranosus M. : Origin

Answer 10

Ischial tuberosity

- flattened membranous proximal attachment

Question 11

Semimembranosus M. : Insertion

Answer 11

• Posterior part of medial condyle of tibia
• Part blends with popliteal fascia and becomes oblique popliteal ligament (reinforces the intercondylar part of joint capsule of knee)

Question 12

Long Head of Biceps Femoris M. : Function

Answer 12

• Flex leg

- Extend thigh

Question 13

Long Head of Biceps Femoris M. : Innervation

Answer 13

Tibial division of sciatic nerve

Question 14

Short Head of Biceps Femoris M. : Function

Answer 14

Only flex leg

Question 15

Short Head of Biceps Femoris M. : Innervation

Answer 15

Common fibular branch of the sciatic nerve

Question 16

Long Head of Biceps Femoris M. : Origin

Answer 16

Ischial tuberosity

Question 17

Long Head of Biceps Femoris M. : Insertion

Answer 17

Head of the fibula

Question 18

Short Head of Biceps Femoris M. : Origin

Answer 18

Distal lateral lip of linea aspera of the femur

Question 19

Short Head of Biceps Femoris M. : Insertion

Answer 19

Head of the fibula

Question 20

Adductor Magnus M. (Hamstring Portion): Origin

Answer 20

Attaches proximally at ischial tuberosity

Question 21

Adductor Magnus M. (Hamstring Portion): Insertion

Answer 21

Adductor tubercle on the medial epicondyle of femur

Question 22

Adductor Magnus M. (Hamstring Portion): Function

Answer 22

Extend thigh

Question 23

Adductor Magnus M. (Hamstring Portion): Innervation

Answer 23

Tibial division of the sciatic nerve