Biceps

Biceps (two-headed), the name of two muscles of the body, one in the arm, the other in the leg, and which are so called from the fact that in each instance the muscle has two heads of origin. The biceps of the arm is readily felt to contract if, for example, the right upper arm be grasped in the left hand, and the right fore-arm be then flexed on the right upper arm. Of its two heads the "short-head" arises from the coracoid process of the scapula and the "long head" from the upper margin of the glenoid cavity. The muscle is inserted below into the tuberosity of the radius. The heads of the biceps of the leg arise one from the hip bone and the other from the femur, the muscle being inserted below into the fibula.