posterior thigh muscles

Question 1

What is the origin, insertion, innervation and function of Biceps femoris short head

Answer 1

i. Not a true hamstring muscle
ii. Origin: femur
iii. Insert: proximal fibula
iv. Nerve: common fibular nerve
v. Action: flexion and lateral rotation at knee

Question 2

What is the origin, insertion, innervation and function of Biceps femoris long head

Answer 2

i. Origin: ischial tuberosity
ii. Insert: head of fibula
iii. Nerve: tibial nerve
iv. Action: extends hip, flexes knee

Question 3

What is the origin, insertion, innervation and function of Semimembranosus

Answer 3

i. Origin: ischial tuberosity
ii. Insert: medial aspect of tibia
iii. Nerve: tibial nerve
iv. Action: extends at hip, flexes at knee

Question 4

what is the origin, insertion, innervation and function of Semitendinosus

Answer 4

i. Origin: ischial tuberosity
ii. Insert: proximal end of tibia
iii. Nerve: tibial nerve
iv. Action: extends at hip, flexes at knee