Nerve to the subclavius

Nerve to the Subclavius is a small branch of the brachial plexus that innervates the subclavius muscle. This nerve arises from the superior trunk of the brachial plexus, which is formed by the union of the fifth and sixth cervical nerves.

Anatomy

The nerve to the subclavius is a slender filament that descends to the subclavius muscle, passing in front of the subclavian artery and the brachial plexus. It is derived from the point of junction of the fifth and sixth cervical nerves.

Function

The primary function of the nerve to the subclavius is to provide motor innervation to the subclavius muscle. This muscle plays a role in the movements of the shoulder, particularly in actions that require downward movement of the shoulder blade, such as when lifting heavy objects.

Clinical Significance

Damage to the nerve to the subclavius can result in weakness or paralysis of the subclavius muscle. This can lead to difficulties in performing movements that require the downward movement of the shoulder blade. However, because the subclavius muscle is not a major mover of the shoulder, the clinical significance of such damage is usually minimal.

See Also

• Brachial plexus
• Subclavius muscle
• Cervical nerves