Posterior cord
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| Nerve: Posterior cord | |
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| Plan of brachial plexus. (Posterior cord is shaded gray.) | |
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| The right brachial plexus with its short branches, viewed from in front. The Sternomastoid and Trapezius muscles have been completely, 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. | |
| Latin | fasciculus posterior plexus brachialis |
| Gray's | subject #210 933 |
| Innervates | none |
| From | brachial plexus - posterior divisions of the three trunks |
| To | subscapular, up. and low. thoracodorsal axillary radial |
| Dorlands / Elsevier |
f_03/12356221 |
The posterior cord is a division of the brachial plexus. It consists of contributions from all of the roots of the brachial plexus.[1]
The posterior cord gives rise to the following nerves:[2]
| Name | Roots | Supplies |
| upper subscapular nerve | C5-C6 | subscapularis muscle of the rotator cuff |
| lower subscapular nerve | C5-C6 | teres major |
| 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 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 |
[edit] References
- ^ Drake, Richard, et al. Gray's Anatomy For Students, Elsevier, 2005. pg. 657
- ^ Mnemonic at medicalmnemonics.com 465
MBBS resources http://mbbsbasic.googlepages.com/
[edit] External links
- Atlas of anatomy at UMich hand_plexus - "Axilla, dissection, anterior view"
- Illustration at preventdisease.com
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