Nerves and their muscles

Question 1

Musculocutaneous n.

Answer 1

C5-C7
Motor: anterior arm
Sensor: anterior and lateral forearm
Path: through coracobrachialis and dives deep

Question 2

Median n.

Answer 2

C6-T1
Motor: anterior forearm except flexor carpi ulnaris and the ulnar 2 digits of flexor digitorum profundus
Sensory: anterior forearm and palmar first 3.5 digits and dorsal first 3 finger tips
Path: goes through protantor teres and branches into anterior interosseous (deep anterior forearm), through the carpal tunnel then branches into recurrent median (opponens pollicis, abductor pollicis brevis, and flexor pollicis brevis (thenar eminence)), and a cutaneous median (sensory). The median nerve terminates by innervating the 2 most radial lumbricals.

Question 3

Radial n.

Answer 3

C5-C8
Sensory: Radial dorsum of the hand
Motor: posterior arm and forearm
Path: runs in radial groove of humerus then passes over the lateral epicondyle and goes to posterior arm it branches into the deep radial n. which innervates the supinator, which in turn branches into the posterior interosseous (posterior forearm). The original nerve then gets brachioradialis and extensor carpi radialis longus as it ends near the anatomical snuffbox

Question 4

Axillary n.

Answer 4

C5-C6
Motor: deltoids and teres minor
Path: around surgical head of the humerus

Question 5

Ulnar

Answer 5

C8-T1
Motor: Hand with exceptions and 1.5 anterior forearm
Sensor: ulnar palm
Path: branches into deep ulnar which does intrinsic hand muscles except 2LOAF and the original ulnar n. gets flexor carpi ulnaris and the ulnar 2 digits of flexor carpi digitorum

Question 6

Dorsalscapular n.

Answer 6

C5

Levator scapulae, rhomboid major, and rhomboid minor

Question 7

Long thoracic n.

Answer 7

C5-C7

Serratus anterior

Question 8

Suprascapular n.

Answer 8

C5-C6

Supraspinatus and infraspinatus

Question 9

Lateral pectoral n.

Answer 9

C5-C7

Pectoralis minor

Question 10

Upper subscapular n.

Answer 10

C5-C6

Subscapularis

Question 11

Thoracodorsal n. (middle subscapular n.)

Answer 11

C6-C7

Latissimus dorsi

Question 12

Lower Subscapular n.

Answer 12

C5-C6

Subscapularis and teres major

Question 13

Medial pectoral n.

Answer 13

C8-T1

Pectoralis major and pectoralis minor

Question 14

Medial brachial cutaneous n.

Answer 14

C8-T1

Sensory: medial arm

Question 15

Medial antebrachial cutaneous n.

Answer 15

C8-T1
Sensory: medial forearm
Path: runs medially with brachial artery and basilic vein