Symptoms Matched With Nerve Lesion (Ue/brachial Plexus)

Front 1

Fractured surgical neck of humerus; anterior dislocation of humeral head.
Improperly given IM injections.
Loss of arm abduction at shoulder.
Sensory deficit at deltoid.

Back 1

Axillary nerve (C5-C6)

Front 2

Fracture at midshaft of humerus
Saturday night palsy
Crutches
Wrist drop (loss of extension in wrist and fingers)
Loss of extension of arm
Sensory loss at posterior arm, dorsal hand, dorsal thumb
loss of brachioradialis reflex

Back 2

Radial nerve (C5-C8)

Front 3

Fracture of supracondylar humerus
Loss of pronation
weak wrist flexion
loss of thumb flexion
Sensory loss in dorsal and palmar aspects of later 3.5 fingers, thenar eminence.

Back 3

Proximal lesion of median nerve (C6-C8, T1)

Front 4

Carpal tunnel syndrome or dislocated lunate.
Loss of opposition of thumb.
Numbness on dorsal and palmar aspects of lateral 3.5 fingers
Ulnar deviation of wrist upon wrist flexion.

Back 4

Distal lesion of median nerve (C6-C8, T1)

Front 5

Fracture of medial epicondyle of humerus
Loss of medial finger flexion, wrist flexion
radial deviation of wrist upon wrist flexion
Numbness on medial 1.5 fingers, hypothenar eminence

Back 5

Proximal lesion of ulnar nerve (C8, T1)

Front 6

Fracture of hook of hamate (FOOSH)
loss of extension of 4th and 5th fingers (lumbricals)-->pope's blessing
loss of thumb abduction
loss of abduction and adduction of fingers
numbness middle 1.5 fingers, hypothenar eminence

Back 6

Distal lesion of ulnar nerve

Front 7

Upper trunk compression
loss of flexion of arm at elbow
numbness in lateral forearm

Back 7

Musculocutaneous nerve (C5-C7)

Front 8

Erb-Duchenne palsy/waiter's tip
limb hangs by side (paralysis of abductors), medially rotated (paralysis of lateral rotators), forearm is pronated (loss of biceps).
Trauma in delivery; accident causing blow to the shoulder e.g. motorcycle accident

Back 8

Upper trunk of brachial plexus (C5 and C6 nerve roots)

Front 9

Atrophy of the thenar AND hypothenar eminences
Atrophy of the interosseous muscles
"Claw hand"
sensory deficit along medial side of forearm and hand
embryological or childbirth defect; traumatic delivery or fracture of the clavicle

Back 9

Klumpke's palsy: inferior trunk of brachial plexus (C8, T1)
If disappearance of radial pulse with provocative testing also: thoracic outlet syndrome.

Front 10

Winged scapula
unable to lift arm above horizontal
thoracic surgery (mastectomy); stab wound

Back 10

Long thoracic nerve

Front 11

Weak lateral rotation of arm

Back 11

Suprascapular nerve (infraspinatus) or axillary nerve (deltoid)

Front 12

Trouble initiating arm abduction

Back 12

Supra scapular nerve (supraspinatus)

Front 13

Unable to abduct arm beyond 10 degrees

Back 13

axillary nerve (deltoid)

Front 14

Unable to raise arm above horizontal

Back 14

Long thoracic and/or spinal accessory

Front 15

Numbness in lateral, posterior hand

Back 15

Superficial branch of radial nerve

Front 16

Ape hand: cannot oppose thumb, thumb movements limited to flexion/extension in the plane of the palm

Back 16

Recurrent branch of median nerve