Biceps Brachii Muscle (Long Head)

The long head of biceps brachii muscle is the larger of the two bodies of that muscle. Some muscles have more than one origin (immovable end) or insertion (movable end). The biceps brachii in the upper arm, for example, has two origins. This is shown in its name, biceps, which means two heads. It is attached to the scapula (shoulder blade) in two places and extends along the front surface of the humerus (upper arm bone). It is inserted by means of a tendon on the largest part of the radius...

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    Full Biceps Brachii Muscle (Long Head) Description

    [Continued from above] . . . (lower arm bone). When it contracts, the movable end is pulled toward the origin, and the arm bends at the elbow.