Posterior thigh

Question 1

Biceps femoris

Answer 1

Attachments: both heads attach to lateral side of fibular head
long head - ischial tuberosity
short head - linea aspera, lateral supracondylar line of femur
Innervation:
long head - tibial nerve (L5-S2)
short head - common fibular nerve
Actions: Flexes knee, ER tibia, extends hip

Question 2

Semimembranosus

Answer 2

Attachments: ischial tuberosity to posterior medial condyle of tibia
Innervation: tibial nerve
Actions: flexes knee, extends hip

Question 3

Semitendinosus

Answer 3

Attachments: ischial tuberosity to superior medial surface of tibia (pes anserine)
Innervation: tibial nerve
Actions: flexes knee, extends hip