The posterior cord is a part of the brachial plexus. It consists of contributions from all of the roots of the brachial plexus.

The posterior cord gives rise to the following nerves:

Name	Roots	Supplies
upper subscapular nerve	C5-C6	subscapularis muscle of the rotator cuff
lower subscapular nerve	C5-C6	subscapularis muscle, teres major muscle
thoracodorsal nerve	C6-C8	latissimus dorsi muscle
axillary nerve	C5-C6	sensation to the shoulder and motor to the deltoid muscle, the teres minor and the triceps brachii (long head) muscle
radial nerve	C5-C8, T1	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