BRACHIAL PLEXUS
- X - upper trunk ( C5 + C6)
- Y - middle trunk (C7)
- Z - lower trunk (C8 + T1)
- A - anterior division
- P - posterior division
- Pxyz - posterior cord
- Axy - Lateral cord
- musculocutaneous nerve (x)
- lateral root to median (cy)
- Az - medial cord
- ulnar nerve (yz)
- medial root of median(z)
- xyz - lateral root and medial root join
- median nerve
- nerve to subclavius ( x )
- suprascapular nerve ( x)
- long thoracic nerve ( xy)
Discussion