Extension of forearm/wrist

Supination

Sensation back of lateral hand (thumb, 2 and 3)

Wrist drop

Saturday Night Palsy/Incorrect crutch use

Midshaft humerus fracture

Runs with deep brachial artery and post. interosseus

Wimpy nerve- lumbricals, interosseus mm.

MCP Flex, abduct and adduct fingers

DAB (dorsal lumbricals Ab)

PAD (palmar lumbricals Ad)

Pronation

Medial palm and dorsum sensation (5 and 1/2 of 4)

Claw Hand 

Medial epicondyle fracture

Hook of hamate fracture

Runs with ulnar artery

Thumb opposition and flexion

Pronation

Lateral palm sensation

Back of fingers 2 and 3 sensation

Bishop's Hand

Ape Hand

Supracondylar humeral fracture

Carpal Tunnel

Runs with brachial artery

Musculocutaneous Nerve

Flexion of arm and forearm

Supination

Deltoid-Abduction of arm beyond 10 degrees to horizontal

Fractured surgical neck of humerus

Anterior shoulder dislocation

Runs with posterior circumflex artery

Supraspinatus m. - initiation of arm abduction

infraspinatus m.- lateral rotation of arm

Serratus Anterior

Scapular winging

Raising arm above horizontal (w/trapezius/spinal n)

Mastectomy complication (w lymphedema)

Stab wound to the side of the chest

Latissimus dorsi

Unable to wipe bottom

C5 and C6

Erb Duchenne Palsy

"Waiter's Tip"

abductors, lateral rotators, supinators paralyzed

limb hangs by side, medially rotated and pronated

C8, T1

Klumpke's Palsy

Loss of all lumbricals, finger flexors

Fingers extended at MCP, flexed at PIP, DIP

Thoracic Outlet Syndrome

Cervical rib or anterior scalene hypertrophy compresses C8, T1 and subclavian artery

Atrophy of thenar, hypothenar, interossei

Radial pulse disappears when head moves to same side (Adson's sign)