Upper trunk
Jump to navigation
Jump to search
Template:Infobox Nerve Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
The upper trunk (or superior trunk) is a trunk of the brachial plexus which derives from the C5 and C6 roots.
Damage to the upper trunk causes
- Arm hangs by side,
- Elbow can’t flex,
- Arm medially rotated,
- Forearm pronated,
- ‘waiter’s tip’,
- Loss of sensation over deltoid (C5) and lateral upper limb (C6).
The musculocutaneous and median nerves derive largely from this trunk.