Upper limb

Roots - 

Dorsal Scapular Nerve (C5) 

Long Thoracic Nerve Of Bell (C5-C7)

Upper Trunk -

Suprascapular Nerve (C5,C6)

Nerve to Subclavius (C5,C6)

Lateral Cord -

Lateral Pectoral Nerve (C5-C7)

Musculocutaneous Nerve (C5-C7)

Lateral Root of Median Nerve (C5-C7)

Medial Cord -

Medial Pectoral Nerve (C8,T1)

Medial Cutaneous Nerve of Forearm (C8,T1)

Medial Cutaneous Nerve of Arm (C8,T1)

Ulnar Nerve (C8,T1)

Medial Root of Median Nerve (C8,T1)

Posterior Cord - 

Upper Subscapular Nerve (C5,C6)

Thoracodorsal Nerve (C6-C8)

Axillary Nerve (C5,C6)

Radial Nerve (C5-T1)

Lower Subscapular Nerve (C5,C6)

Note - However in a considerable number of cases, the ulnar nerve receives fibers also from C7. These fibres reach the ulnar nerve via middle trunk, its anterior division, lateral cord, lateral root of median nerve & then a communicating ramus from lateral root of median nerve to ulnar nerve . The communicating ramus may be sometimes called lateral root of ulnar nerve . According to Doyle & Botte [5], communicating ramus bringing fibres from C7 may arise not only from lateral root of median nerve but even proximal to it i.e. lateral cord, the anterior division of middle trunk or even middle trunk itself. Whatever may be the origin, this communicating ramus is termed as the lateral root of ulnar nerve. It usually joins the ulnar nerve at or distal to the inferior border of the subscapularis muscle & may provide innervation to flexor carpi ulnaris muscle. The existence of such rami may be of importance in the evaluation of unexplained sensory loss after trauma or surgical intervention in a particular area . One must be aware that this kind of variation is more prone to injury in surgical operations of the axilla and that, the very close course of the unusual communicating ramus to the axillary artery may lessen the blood supply of the upper extremity by compressing the vessel (Source - International Journal of Anatomy and Research ISSN 2321-4287 ; Authors - Priti Chaudhary1*, Rajan Singla2 , Kamal Arora3 , Gurdeep Kalsey4)

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