Upper trunk

Template:Infobox Nerve Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

The upper trunk (or superior trunk) is a trunk of the brachial plexus which derives from the C5 and C6 roots.

• 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.

Template:Brachial plexus

Template:WikiDoc Sources