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Muscular Branches of Ulnar Nerve (Forearm; Left)
Nervous System

Muscular Branches of Ulnar Nerve (Forearm; Left)

Rami musculares nervi ulnaris

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Description

The ulnar nerve descends from the posterior compartment of the arm to pass behind the medial epicondyle of the humerus. It passes between the two heads of flexor carpi ulnaris muscle and innervates it. The nerve descends further to enter anterior forearm lying on the surface of flexor digitorum profundus, where it supplies branches to medial half of this muscle.

At the wrist, the ulnar nerve lies between the flexor carpi ulnaris and the flexor digitorum superficialis muscles. At the distal border of retinaculum, the nerve terminates by dividing into its superficial and deep branches.

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Ulnar Nerve

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The ulnar nerve (and accompanying artery) pass deep to the volar ligament before branching into the deep and superficial branches.

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