Sesame bone

from Wikipedia, the free encyclopedia
Sesame bone of the big toe

A sesamoid bone (Latin Os sesamoideum ) is a small bone that is embedded in a tendon and provides additional distance to the bone. This creates more leverage for the tendon , so that less force is required to move the bone attached to the tendon. In addition, sesamoid bones prevent tendons from being damaged by pressure as they run over a joint .

The best-known and largest sesamoid bone is the kneecap , which is embedded in the tendon of the quadriceps femoris muscle . This construction allows the knee joint to be easily stretched without the thigh having to have any more muscle mass. Another sesamoid bone is the pea bone , a wrist bone that lies in the tendon of the flexor carpi ulnaris muscle .

Sesame bones in horses: