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.[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 | 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 |
Additional images
[edit]-
Brachial plexus
-
Posterior cord
-
Posterior cord
-
Brachial plexus. Deep dissection.
-
Brachial plexus. Deep dissection. Anterolateral view
References
[edit]MBBS resources http://mbbsbasic.googlepages.com/
External links
[edit]- Atlas image: hand_plexus at the University of Michigan Health System - "Axilla, dissection, anterior view"