| Upper trunk | |
| Latin: | truncus superior plexus brachialis |
| Branchfrom: | Ventral rami of C5 and C6 |
| Branchto: | Anterior division of upper trunk, posterior division of upper trunk, subclavian nerve, suprascapular nerve |
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.
The branches of the upper trunk from proximal to distal are:
The axillary, radial, musculocutaneous and median nerves all contain axons derived from the upper trunk.