Extensor finger of the hand

The extensor of the fingers (lat. musculus extensor digitorum manus) is a paired long muscle of the forearm, belongs to the extensors of the fingers and hand.

The extensor digitorum begins as a common tendon from the lateral epicondyle of the humerus, the interosseous membrane of the forearm and the ulna. The muscle then passes into four tendons, which, passing under the carpal ligament, diverge to the dorsum of the main phalanges of the index, middle, ring and little fingers, where they attach, extending these fingers at the interphalangeal and metacarpophalangeal joints.

The extensor digitorum is innervated by the radial nerve. The main function is extension of the index, middle, ring and little fingers in the interphalangeal and metacarpophalangeal joints.

The extensors of the fingers are located in the forearm. A person can observe this by feeling the muscles that, on the side of the elbow joint, bring the hand back to its natural position. At the same time, the back of the hand offers little resistance to this process, which is typical for all