Name
Pronunciation
(eks-TEN-sor KAR-pi ra-de-A-lus LONG-gus)
Origin/Proximal Attachment
Lower lateral supracondylar ridge of humerus (below brachioradialis); lateral intermuscular septum of humerus
Insertion/Distal Attachment
Base of 2nd metacarpal
Action/Relevance
Extends the hand at the wristRadially deviates the hand at the wristWeakly flexes the forearm at the elbow4. Weakly supinates the forearm
Innervation
Radial nerve (C6, 7)
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