posterior compartment of arm
Definition: posterior portion of the space enclosed by the brachial fascia, separated from the anterior compartment by the humerus and the lateral and medial intermuscular septa that extend from it; contains the triceps muscles that extend the forearm at the elbow joint and are innervated by the radial nerve.
Synonym(s): compartimentum brachii posteriusTA, compartimentum brachii extensorum, extensor compartment of arm
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