The subclavian nerve, also known as the nerve to the subclavius, is a small branch of the upper trunk of the brachial plexus. It contains Axon from C5 and C6. It innervates the subclavius muscle.
Anatomy
Origin
The subclavian nerve is a branch of the
upper trunk of the
brachial plexus. It contains
Axon derived from the ventral rami of the C5 and C6 cervical
Spinal nerve.
The origin is situated within the posterior triangle of the neck.
Course
Descending, it passes anterior to (the 3rd part of) the subclavian artery and
Subclavian vein.
Variation
Accessory phrenic nerve
The subclavian nerve may issue a branch called the accessory phrenic nerve
which innervates the diaphragm.
The accessory phrenic nerve may rather branch from the C4 or C6 segments or
ansa cervicalis.
This nerve usually joins with the
phrenic nerve before innervating the diaphragm, ventral to the
subclavian vein.
Function
The subclavian nerve innervates the subclavius muscle.
==Additional images==
