biceps femoris

Hamstring muscle of the posterior compartment of the thigh. Origin: 1) long head: tuberosity of the ischium 2) short head: lower 1/2 of the lateral lip of the linea aspera (posterior femur) Insertion: head of the fibula Action: 1) flexes knee 2) rotates the flexed knee laterally Innervation: 1) long head: tibial nerve 2) short head: common fibular nerve One of the muscles that crosses 2 joints (hip & knee).

References

Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999