Posterior cord of brachial plexus

Nerves · Latin: Fasciculus posterior plexus brachialis

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The posterior cord is a part of the infraclavicular part of brachial plexus.

It consists of contributions from all of the roots of the brachial plexus.

The posterior cord gives rise to the following nerves:

-The upper subscapular nerve Roots: C5-C6 Supplies: subscapularis muscle of the rotator cuff

-The lower subscapular nerve Roots: C5-C6 Supplies: subscapularis muscle, teres major muscle

-The thoracodorsal nerve Roots: C6-C8 Supplies: latissimus dorsi muscle

-The axillary nerve Roots: C5-C6 Supplies: sensation to the shoulder and motor to the deltoid muscle, the teres minor and the triceps brachii (long head) muscle

-The radial nerve Roots: C5-C8, T1 Supplies: triceps brachii muscle, the brachioradialis muscle, the extensor muscles of the fingers and wrist (extensor carpi radialis muscle), supinator, and the extensor and abductor muscles of the thumb.

Definition from Wikipedia, CC BY-SA 4.0.