Nerve lesions in upper limb
Quick synopsis	Carpal tunnel: weak abductor pollicis brevis, numb 3 and a half fingers. Ulnar nerve: weak finger abduction, numb 1 and half finger. Radial nerve palsy: wrist drop, numb on dorsum web between thumb and index.
Nerve	Symptoms, Signs and most common cause
Axillary	Pain: shoulder tip Cause: fracture neck of humerus, dislocated shoulder, deep IM injection. Motor weakness: deltoid. Sensory loss: small area over deltoid.  Reflex: none
Musculo- cutaneous	Pain: Lateral forearm  to wrist. Cause: rarely damaged. Motor weakness: biceps and brachialis. Sensory loss: dorsum of thumb. Reflex: biceps.
Radial	Pain: dorsum of thumb and index. Cause: Crutch palsy, Saturday night palsy, fractured humerus. Motor weakness: Triceps, wrist and finger extensors, brachioradialis and supinator of forearm. Sensory loss: dorsum of thumb and index. Reflex: triceps and supinator jerks.
Median	Pain: thumb, index and middle finger, often spread up to forearm. Cause:  Wrist: Carpal Tunnel syndrome, direct trauma to wrist, suicide attempt, falling on glass. Antecubital fossa: direct trauma, fracture Differential diagnosis of CTS Motor weakness:  at elbow: wrist flexors Anterior interosseus nerve: long finger flexors to thumb, index and middle fingers Wrist: abductor pollicis brevis. Sensory loss: thumb, index, middle and half of ring finger. Reflex: finger jerk.
Ulnar	Pain: Little finger and half of ring finger. Cause:  Elbow: local trauma, prolonged pressure, repeated minor trauma, fractured olecranon. Wrist: local trauma, ganglion cyst at wrist. Motor weakness: All small muscles in hand except Abductor pollicis brevis. Sensory loss: Little finger and half of ring finger. Reflex: none
Spinal root syndromes - UNC Cervical Radiculopathy - NL