As it courses the dorsum of the hand, the extensor digitorum communis muscle spreads out into four (4) flat tendons deep to the extensor retinaculum to the medial four fingers.

In the fingers, the extensor digitorum acts principally on the proximal phalanges, acting to extend the metacarpophalangeal joint. Extension of the proximal and distal interphalangeal joints, however, is mediated predominantly by the dorsal and palmar interossei and lumbricals of the hand. Bones of left forearm. Posterior aspect.

Read about the extrinsic extensors (EDC), how to test the maximum proximal excursion of the EDC, and how to reduce lag/adherence in this Clinical Pearl.

Nov 3, 2023 · Extensor digitorum is a superficial muscle of the posterior compartment of the forearm. Like the majority of the muscles in this compartment, it originates via common extensor tendon that arises from the lateral epicondyle of humerus.

Jun 21, 2024 · The extensor digitorum communis muscle (EDC), the principal extensor of the medial four digits of the hand, occupies much of the posterior surface of the forearm. It’s located in the superficial compartment of the posterior forearm.

Feb 8, 2023 · Extensor digitorum (ED) muscle, also known as extensor digitorum communis (EDC) muscle, is a muscle of the superficial layer of the posterior compartment of the forearm and with other extensor muscles arises from a common …

The extensor carpi radialis longus (ECRL) has the most proximal origin of the extrinsic hand extensors. It originates just distal to the brachioradialis at the lateral supracondylar ridge of the humerus, the lateral intermuscular septum, and by a few …

Extensor Hoods are an elaboration of the extensor digitorum comunis (EDC) tendon on the dorsum of each phalanx. The extensor indicis (EI) and the extensor digiti minimi (EDM) insert into the extensor hoods of the second and fifth digits, respectively.

Extensor digitorum communis (EDC) tendons. EDC tendons straighten the index, middle, ring and small fingers. A common muscle belly is shared by all the fingers. The tendons travel down the forearm through a tough band of tissue on top of the wrist.

Extensor digitorum communis (EDC) tendon: This tendon originates from the common extensor muscle on the forearm and divides into three slips at the level of the metacarpophalangeal (MCP) joint. Each slip inserts into the base of the corresponding proximal phalanx through the …