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Muscular Branch of Radial Nerve to Anconeus (Right)
Nervous System

Muscular Branch of Radial Nerve to Anconeus (Right)

Ramus musculi anconei nervi radialis

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Origin

The muscular branch to the anconeus muscle arises from the radial nerve (C6—C8 cervical spinal segments).

Course

The radial nerve passes through the lower triangular space to descend inside the spiral radial groove against the humerus, between the lateral and medial heads of triceps muscle. Two muscular branches are given off in the groove to the lateral and medial heads of triceps muscle. The second branch of the radial nerve to the medial head of the triceps brachii also innervates the anconeus muscle. This is the more distal of the two branches that innervates the medial head of the triceps brachii, after which it passes through the medial head in the posterior compartment of the arm and continues distally to provide innervation for the anconeus muscle.

Branches

There are no named branches.

Supplied Structures

The muscular branch of the radial nerve to anconeus provides motor innervation to the anconeus muscle.

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Radial Nerve

ScienceDirect image

The superficial radial nerve (SRN) is easily identified in the subcutaneous tissue above as it sweeps downward, crossing the fascia below (Figure 32.6).

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