Chapter 5 - UE MMT Innervations

Question 1

scapular elevation

Answer 1

spinal accessory n. (CN XI) ==> upper trapezius
C3-C4 ==> upper trapezius; levator scapulae
dorsal scapular n. (C4-C5) ==> levator scapulae

Question 2

scapular adduction

Answer 2

spinal accessory n. (CN XI) ==> middle trapezius

dorsal scapular n. (C4-C5) ==> rhomboids

Question 3

scapular depression and adduction (scaption)

Answer 3

spinal accessory n. (CN XI) ==> lower trapezius

Question 4

scapular adduction and downward rotation

Answer 4

dorsal scapular n. (C4-C5) ==> rhomboids

Question 5

scapular depression

Answer 5

thoracodorsal n. (C6-C8) ==> latissimus dorsi
lower subscapular n. (C5-C6) ==> teres major

P deltoid also involved (axillary n. C5-C6)

Question 6

shoulder flexion

Answer 6

axillary n. (C5-C6) ==> A deltoid
musculocutaneous n. (C5-C7) ==> coracobrachialis

supraspinatus also involved (suprascapular n. C4-C6)

Question 7

shoulder extension

Answer 7

axillary n. (C5-C6) ==> P deltoid

Question 8

shoulder abduction

Answer 8

suprascapular n. (C4-C6) ==> supraspinatus

axillary n. (C6-C6) ==> middle deltoid

Question 9

shoulder horizontal abduction

Answer 9

axillary n. (C5-C6) ==> P deltoid

Question 10

shoulder horizontal adduction

Answer 10

L pectoral n. (C5-C7) ==> clavicular pectoralis major

M pectoral n. (C6-T1) ==> sternocostal pectoralis major

Question 11

shoulder external rotation

Answer 11

suprascapular n. (C4-C6) ==> infraspinatus

axillary n. (C5-C6) ==> teres minor

Question 12

shoulder internal rotation

Answer 12

L pectoral n. (C5-C7) ==> clavicular pectoralis major
M pectoral n. (C6-T1) ==> sternocostal pectoralis major
thoracodorsal n. (C6-C8) ==> latissimus dorsi
upper subscapular n. (C5-C6) ==> upper subscapularis
lower subscapular n. (C5-C6) ==> lower subscapularis

Question 13

elbow flexion

Answer 13

musculocutaneous n. (C5-C7) ==> biceps brachii; brachialis

radial n. (C5-C6) ==> brachioradialis

Question 14

elbow extension

Answer 14

radial n. (C6-C8) ==> triceps brachii

Question 15

forearm supination

Answer 15

musculocutaneous n. (C5-C7) ==> biceps brachii

radial n. (C6-C7) ==> supinator

Question 16

forearm pronation

Answer 16

median n. (C6-C7) ==> pronator teres

median n. (C7-C8) ==> pronator quadratus

Question 17

wrist flexion

Answer 17

median n. (C6-C7) ==> flexor carpi radialis

ulnar n. (C7-T1) ==> flexor carpi ulnaris

Question 18

wrist extension

Answer 18

radial n. (C6-C7) ==> extensor carpi radialis longus
radial n. (C7-C8) ==> extensor carpi radialis brevis
radial n. (C7-C8) ==> extensor carpi ulnaris

Question 19

scapular abduction and upward rotation

Answer 19

long thoracic n. (C5-C7) ==> serratus anterior