posterior compartment of forearm

Definition: posterior portion of the space enclosed by the antebrachial fascia, separated from the anterior compartment by the radius and ulna and by the intervening interosseous membrane; the spaces are demarcated superficially by the subcutaneous border of the ulna and the (pulse of the) radial artery; contains a supinator of the forearm, extensors of the hand at the wrist, and long extensors of the digits, all innervated by the radial nerve.

Synonym(s): compartimentum antebrachii posteriusTA, compartimentum antebrachii extensorum, extensor compartment of forearm

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