Thigh: Posterior Compartment

Question 1

Biceps Femoris

Answer 1

Origin…
Long head: ischial tuberosity
Short head: Linea aspera and lateral supracondylar
line of femur

Insertion… Lateral side of head of fibula

Innervation…
Long head: sciatic nerve (tibial)
Short head: sciatic nerve (common fibular)

Blood Supply… Perforating branches of profunda femoris,
inferior gluteal, medial circumflex femoral
arteries

Action… Extend thigh, flex leg

Question 2

Semitendinosus

Answer 2

Origin… Ischial tuberosity

Insertion… Superior part of medial surface of tibia

Innervation… Sciatic nerve (Tibial)

Blood Supply… Perforating branches of profunda femoris,
inferior gluteal, medial circumflex femoral
arteries

Actions… Extend thigh, flex leg

Question 3

Semimembranosus

Answer 3

Origin… Ischial tuberosity

Insertion… Posterior part of medial condyle of tibia

Innervation… Sciatic nerve (Tibial)

Blood Supply… Perforating branches of profunda femoris,
inferior gluteal, medial circumflex femoral
arteries

Actions… Extend thigh, flex leg

Question 4

Adductor Magnus

Medial Compartment

Answer 4

Origin… Inferior pubic ramus, ramus of ischium
Hamstring: Ischial tuberosity

Insertion… Gluteal tuberosity, linea aspera, medial
supracondylar line
Hamstring: Adductor tubercle of femur

Innervation… Obturator nerve
Hamstring: Sciatic (Tibial)

Blood Supply… Femoral, profunda femoris, obturator
arteries

Action… Adducts and flexes thigh
Hamstring: Extends thigh

Question 5

Pes Anserinus

Goose Foot

Answer 5

Meet up point of the sartorius, gracilis, and semitendinosus