Posterior cord

The posterior cord is a part of the brachial plexus. It consists of contributions from all of the roots of the brachial plexus.[1]

Posterior cord
Plan of brachial plexus. (Posterior cord is shaded gray.)
The right brachial plexus with its short branches, viewed from in front. The Sternomastoid and Trapezius muscles have been completely removed, the Omohyoid and Subclavius have been partially removed; a piece has been sawed out of the clavicle; the Pectoralis muscles have been incised and reflected.
Frombrachial plexus - posterior divisions of the three trunks
Tosubscapular, up. and low.
Latinfasciculus posterior plexus brachialis
Anatomical terms of neuroanatomy

The posterior cord gives rise to the following nerves:[2]

upper subscapular nerveC5-C6subscapularis muscle of the rotator cuff
lower subscapular nerveC5-C6subscapularis muscle, teres major muscle
thoracodorsal nerveC6-C8latissimus dorsi muscle
axillary nerveC5-C6sensation to the shoulder and motor to the deltoid muscle, the teres minor and the triceps brachii (long head) muscle
radial nerveC5-C8, T1triceps 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

Additional images


  1. Drake, Richard, et al. Gray's Anatomy For Students, Elsevier, 2005. pg. 657
  2. 465

MBBS resources

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