Brachial Plexus Branches

Brachial Plexus Branches
Nerve	Innervation	Damage to Nerve leads to:
Musculocutaneous	Flexors of arm Flexors of forearm	Weak arm & forearm flexion Weak forearm supination
Axillary	Deltoid	Failure to abduct arm
Radial	Extensors of Forearm Wrist Proximal phalanges Thumb	Unable to extend arm, forearm, proximal phalanges, thumb Unable to extend wrist: Wrist-drop Unable to supinate, abduct
Median	Flexors of Wrist Hand	Flexor, pronator, thenar muscles paralysis; Unable to flex the index and middle fingers leading to: Benediction sign
Ulnar	Flexors of Wrist Hand Extensors of Phalanges	Unable to flex the flexors, 4th and 5th phalanges: Claw-hand Unable to adduct thumb

Mnemonic for Brachial Plexus Branches: "My Aunt Raped My Uncle"

From Lateral to Medial: Musculocutaneous, Axillary, Radial, Median, and Ulnar nerves

Long thoracic

Serratus anterior

Winged-scapula (scapula alata)