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Extrinsic muscles of the hand innervated by the radial nerve. extensor digitorum communis (EDC), extensor digiti minimi (EDM), extensor indicis, extensor pollicis longus (EPL), extensor pollicis brevis (EPB), abductor pollicis longus (APL).
The radial nerve is an essential component of the correctly functioning upper limb. It innervates essentially all the muscles on the posterior aspect of our arms, and is therefore a large nerve. When we look at our evolutionary lineage, we must ask ourselves why we have such powerful elbow extensors (triceps brachii).