A Clinical Evaluation of the Length of Segments andBranches of the Brachial Plexus

Introduction: the brachial plexus is a network of nerves originating in the periclavicularregion and provides sensory and motor innervation to the upper extremity. the plexus isan important structure due to its anatomical location and vulnerability to damage. as such,surgeons need to be able to locate individual plexus segments or nerve branches whenperforming procedures. however, finding the sites of uniting and dividing points withinthe brachial plexus can prove challenging.methods: dissections were performed bilaterally on 30 formalin-fixed adult cadavers toexpose the individual segments and branches of the brachial plexus. subsequently, variousmeasurements were taken. measurements included the length of the roots, trunks, divisions,cords, and terminal branches (musculocutaneous, median, ulnar, radial, and axillary nerves).results: the statistical test revealed the mean±sd length of the middle and inferior trunkwas 34.75±29.6 mm and 39.8±14.2 mm respectively. the mean±sd of lateral cord was47.75±14.98 mm, the posterior cord 45±13.20 mm, and the medial cord was 48.75±16.44 mm.the terminal branches were as follows: musculocutaneous nerve 67±25.03 mm, median nerve206.20±116 mm, ulnar nerve 219.70±29.70 mm, radial nerve 117.30±17 mm and axillarynerve 65.60±13.30 mm.conclusion: a thorough understanding of all relevant anatomical landmarks is mandatoryfor any successful procedure. common techniques, such as brachial plexus blocks, requiredetailed anatomical literature due to the complexity and variability of the plexus. results fromthis study will add to the understanding of the anatomy of the brachial plexus and further assist clinicians in pre- and perioperative surgical planning.