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Plexus
nerve | muscle | loss |
---|---|---|
axillary nerve (shoulder) | deltoid, teres minor | shoulder abduction, weakened shoulder external rotation |
musculocutaneous nerve (humerus) | coracobrachialis, biceps, brachialis | forearm flexion when supinated, weakened supination |
radial nerve (posterior forearm) | triceps, anconeus, brachilradialis, supinator, wrist, finger, and thumb extensors | elbow, wrist, finger, and thumb extension (wrist drop) |
median nerve (thumb side) | pronators, wrist and finger flexors on radial side, must thumb muscles | forearm pronation, thumb opposition, flexion, and abduction |
ulnar nerve (pinky side) | flexor carpi ulnaris, flexor digitorum profundus, interossei, 4th and 5th lumbricales | wrist ulnar deviation, thumb adduction, most intrinsics, weakened wrist, finger flexion, weakened 4th and 5th finger flexion |