biceps femoris

Question 1

biceps femoris shape

Answer 1

long, fusiform with 2 heads

Question 2

biceps femoris origin

Answer 2

long head -> lower medial part of ischial tuberosity

short head -> lower half of lateral lip of linea aspera & lateral supracondylar line

Question 3

biceps femoris insertion

Answer 3

head of the fibula

tendon is split in two by the lateral collateral ligament

Question 4

biceps femoris direction of fibres

Answer 4

inferiorly, laterally

Question 5

biceps femoris actions

Answer 5

flexes knee, extends hip, laterally rotates tibia on femur

Question 6

biceps femoris function

Answer 6

walking (hip extension & deceleration during swing phase)

Question 7

biceps femoris nerve supply

Answer 7

sciatic nerve L5, S1, S2