case_images: PMC10651366_01
case_images: The formation of the terminal branches of the brachial plexus from the medial and lateral cords. Muscular to the coracobrachialis muscle (
  white arrow
  ). AA, axillary artery; Lr, lateral root of the median nerve; BBM, biceps brachialis muscle; CBM, coracobrachialis muscle; CNT, common neural trunk; MCN, musculocutaneous nerve; MN, median nerve; Mr, medial root of the median nerve; UN, ulnar nerve; (*), medial cutaneous brachii nerve.
case_images: 10-1055-s-0043-1767674-i2200010-1.jpg
case_images: PMC10651366_01_10-1055-s-0043-1767674-i2200010-1.jpg
case_images: FI2200010-1
case_images:  As depicted in Fig. 1 the MN (diameter:d: 1.10 mm) was formed, as usual, from a lateral and a medial root at the level of the border between the second and third segments of the axillary artery.
case_images: The division of the common neural trunk (CNT) into the median nerve (MN,
  grey
  ), muscular branches to the biceps brachialis muscle (BBM) and the lateral cutaneous antebrachii nerve (
  blue
  ). MCN, musculocutaneous nerve.
case_images: 10-1055-s-0043-1767674-i2200010-2.jpg
case_images: PMC10651366_01_10-1055-s-0043-1767674-i2200010-2.jpg
case_images: FI2200010-2
case_images:  Moreover, by continuing the dissection further ( Fig. 2 ), we identified some motor branches arising from the lateral side of the supposed to be MN toward the biceps brachii and a sensory neural branch that followed a course along the radial side of the forearm.
case_images: BA, brachial artery; BBM, biceps brachialis muscle; MCN, musculocutaneous nerve continuing as lateral cutaneous antebrachii nerve (
  blue
  ); MCBN, medial cutaneous brachii nerve (
  yellow
  ); MN, median nerve.
case_images: 10-1055-s-0043-1767674-i2200010-3.jpg
case_images: PMC10651366_01_10-1055-s-0043-1767674-i2200010-3.jpg
case_images: FI2200010-3
case_images: After covering some distance incorporated to a common neural trunk (CNT) (d: 2.96 mm), the two nerves finally separated and the MCN gave off some branches to the biceps brachii muscle and continued as the lateral cutaneous antebrachia nerve, while the MN continued its course distantly to the forearm and hand ( Fig. 3 ).