upper trunk upper trunk the upper (superior) trunk is part of the brachial plexus. it is formed by joining of the ventral rami of the fifth (c5) and sixth (c6) cervical nerves. the upper trunk divides into an anterior and posterior division. upper trunkdetailsfromventral rami of c5 and c6toanterior division of upper trunk, posterior division of upper trunk, subclavian nerve, suprascapular nerveidentifierslatintruncus superior plexus brachialista98a14.2.03.004ta26398fma65216anatomical terms of neuroanatomy the branches of the upper trunk from proximal to distal are: subclavian nerve (c5-c6) suprascapular nerve (c5-c6) anterior division of upper trunk (c5-c6, forms part of lateral cord) posterior division of upper trunk (c5-c6, forms part of posterior cord) the axillary, radial, musculocutaneous and median nerves all contain axons derived from the upper trunk. additional images brachial plexus.deep dissection. brachial plexus.deep dissection.anterolateral view nerve supply of the human armsupraclavicular root (dorsal scapular, long thoracic) upper trunk (suprascapular, to the subclavius) infraclavicularlateral cord lateral pectoral ansa pectoralis musculocutaneous (lateral cutaneous of forearm) median/lateral root: anterior interosseous palmar recurrent common palmar digital (proper palmar digital) medial cord medial pectoral ansa pectoralis cutaneous: medial cutaneous of forearm medial cutaneous of arm ulnar: muscular palmar dorsal (dorsal digital nerves) superficial (common palmar digital, proper palmar digital) deep median/medial root: see above posterior cord subscapular (upper, lower) thoracodorsal axillary (superior lateral cutaneous of arm) radial: muscular cutaneous (posterior of arm, inferior lateral of arm, posterior of forearm) superficial (dorsal digital nerves) deep (posterior interosseous) other brachial plexus authority control terminologia anatomica this article is issued from wikipedia. the text is licensed under creative commons - attribution - sharealike. additional terms may apply for the media files.