Divisions of brachial plexus lesions

Question 1

Orders

Answer 1

Roots (C5-T1)
Trunks
Divisions
Cords
Branches

Randy Travis Drinks Cold Beer

Question 2

Brachial plexus protected from clavicle fracture by

Answer 2

Subclavius muscle

Question 3

Axillary

Answer 3

Injury: neck of humerus, dislocation of head
Motor: deltoid
Sensory: deltoid
Sign: atropied deltoid

Question 4

Radial

Answer 4

Injury: midshaft fracture, compression of axilla “Saturday night palsy”

Motor: BEST EXTENSORS (brachioradialis, extensors of writs and fingers, supinators, and triceps)

Sensory: Posterior arm, dorsal hand, thumb

Sign: wrist drop

Question 5

Median

Answer 5

Injury: supracondylar humerus (proximal)
Motor: opposition of thumb, lateral finger flexion, wrist flexion
Sensory: dorsal and palmer of lateral 3 1/2 fingers, thenar eminence
Sign: Ape hand “pope’s blessing”

Question 6

Ulnar

Answer 6

Injury: medial epicondyle (proximal), hook of hamate
Motor: medial finger flexsion, wrist flexion
Sensory: medial 1 1/2 finger, hypothenar eminence
Sign: radial deviation of wrist upon flexion

Question 7

Musculocutaneous

Answer 7

Injury: upper trunk compression
Motor: biceps, brachialis, coracobrachialis, flexion of arm at elbow
Sensory: lateral forearm
Sign:

Question 8

Recurrent branch of median nerve

Answer 8

Injury: superficial laceration of palm
Presentation: Ape hand, loss of thenar muscle group,
NO loss of sensation though.