Biceps femoris

Definition

The biceps femoris is a muscle of the posterior thigh that is part of the hamstrings group, involved in knee flexion and hip extension. It has two heads, long and short, which originate from different parts of the hip and femur.

Related terms

Hamstrings:

A group of three muscles (including the biceps femoris) located at the back of the thigh that are crucial in walking, running, and jumping.

Knee Flexion: The act of bending the knee, a movement primarily enabled by muscles including the biceps femoris.

Hip Extension: A movement involving an increase in angle between the thigh and pelvis; one of the primary actions aided by the biceps femoris