Brachial Plexus and UE Nerves

Question 1

Posterior triangle of neck

Inside contents

Answer 1

Sternocleidomastoid
Trapezius
Clavicle

Brachial plexus
Subclavian vein
External jugular vein
Inferior omohyoid

Question 2

Anterior triangle of neck

Inside contents

Answer 2

Trachea
Mandible
Sternocleidomastoid

Sternothyroid
Sternohyoid
Superior omohyoid

Question 3

Brachial plexus ROOTS

Answer 3

C5, C6, C7, C8, T1

Question 4

Draw the Brachial plexus

Answer 4

DRAW

Question 5

Long Thoracic n.

Answer 5

Serratus anterior (holds scapula to thorax)

Question 6

Suprascapular n.

Answer 6

Supraspinatus (abduct arm) & Infraspinatus (ext rot)

Question 7

Lateral pectoral n.

Answer 7

Pec major (flexion, adduction, medial rot)

Question 8

Upper subscapular n.

Answer 8

Subscapularis (int rot)

Question 9

Thoracodorsal n.

Answer 9

Latissimus Dorsi (ext, adduct, transverse ext, flexion from extended position, int rot)

Question 10

Lower subscapular n.

Answer 10

Teres major (med rot, adduct)

Question 11

Musculocutaneous n.

Answer 11

Biceps, coracobrachialis, brachialis (major flexors of the arm)

Question 12

Axillary n.

Answer 12

Deltoid (abduct), Teres minor (lat rot of humerus), long head of the triceps

Question 13

Radial n.

Answer 13

“BEST”

Triceps and extensors (ext of forearm)

Supinator
Brachioradialis
Extensor carpi radialis longus
Extensor digitorum
Extensor pollicis longus

Question 14

Median n.

Answer 14

Pronators and thenar muscles (pronate arm),

"Pass, Fail, Pass, Fail"
Pronator longus
Flexor carpi radialis
Palmaris longus
Flexor digitorum superficialis

Flexor pollicis longus
1st and 2nd lumbricals

Question 15

Ulnar n.

Answer 15

Flexor carpi ulnaris, Flexor digitorum profundus, interosseous, hypothenar (flex and adduct the hand)
3rd and 4th lumbricals,
Adductor pollicis m.

Question 16

Atrophy of thenar/hypothenar eminences, and interosseous m.

Sensory deficit of medial side of hand and forearm

Disaprearance of radial pulse with moving head toward ipsilateral side

Answer 16

Klumpke palsy

Cervical rib compressing on nerve root

Hypertrophy of the anterior scalene muscles

Question 17

Arm left over a chair, passed out

Wrist drop

Answer 17

“Saturday night palsy”

Radial n.

SHAFT of the humerus

Question 18

Loss of extension in 5th and 4th fingers

Answer 18

Ulnar claw

Question 19

Loss of thumb abduction

Thenar wasting and loss of sensation

Answer 19

Ape hand

median n.

Question 20

Loss of flexion in the 1st and 2nd fingers

Answer 20

Hand of benediction

median n.

Question 21

Shoulder dislocation, which nerve? Which artery?

Answer 21

Axillary n.

Posterior circumflex a.