Posterior cord
| 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. | |
| Details | |
| From | Brachial plexus - posterior divisions of the three trunks |
| To | Subscapular, up. and low. thoracodorsal axillary radial |
| Innervates | None |
| Identifiers | |
| Latin | fasciculus posterior plexus brachialis |
| TA98 | A14.2.03.023 |
| TA2 | 6416 |
| FMA | 45237 |
| Anatomical terms of neuroanatomy | |
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 and the teres minor |
| 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 |