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English: The branchial plexus, including all branches of the C5-T1 ventral primary rami. Includes mnemonics for learning the plexus' connections and branches. An original illustration by Chris Talbot, M.S. in Anatomy and student instructor at Case Western Reserve University.
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The brachial plexus is a network of nerves (nerve plexus) formed by the anterior rami of the lower four cervical nerves and first thoracic nerve (C5, C6, C7, C8, and T1).This plexus extends from the spinal cord, through the cervicoaxillary canal in the neck, over the first rib, and into the armpit, it supplies afferent and efferent nerve fibers to the chest, shoulder, arm, forearm, and hand.
The C8 nerve contributes to the motor innervation of many of the muscles in the trunk and upper limb. Its primary function is the flexion of the fingers, and this is used as the clinical test for C8 integrity, in conjunction with the finger jerk reflex.
This image is a derivative work of the following images: File:Brachial plexus.svg licensed with Cc-by-sa-3.0-migrated, GFDL 2009-12-26T03:11:11Z Mcstrother 982x403 (15162 Bytes) corrected spelling ("subclacius"-->"subclavius") and placement of subscapular nerve (arises from the superior trunk, not the ramus of C5)
Injury to Erb's point is commonly sustained at birth or from a fall onto the shoulder.The nerve roots normally involved are C5 and partly C6. Symptoms include paralysis of the biceps, brachialis, and coracobrachialis (through the musculocutaneous nerve); the brachioradialis (through the radial nerve); and the deltoid (through the axillary nerve).
This image is a derivative work of the following images: File:Brachial_plexus.jpg licensed with PD-US . 2008-06-19T21:37:26Z File Upload Bot (Magnus Manske) 587x500 (55381 Bytes) {{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|Anterior view of right brachial plexus.