Musculus supinator

The video tutorial discusses the supinator muscle, one of the five deep extensors of the forearm. It covers the muscle's origin, insertion, innervation, and function. The supinator muscle originates from the lateral epicondyle of the humerus and the ulna, and it inserts on the radius. It is innervated by the radial nerve and is responsible for supination of the forearm. Unlike other extensors, its primary function is not finger or hand extension but rotation of the radius outward.

How is the supinator muscle innervated?

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Explain the anatomical location of the supinator muscle.

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