Nerves of UL

Question 1

Axillary (BIG 5)

Answer 1

Root value: C56
Motor distribution: deltoid, teres minor
Sensory distribution: skin over deltoid, shoulder joint proprioceptors

Question 2

Radial (BIG 5)

Answer 2

Root value: C5678 T1
Motor distribution: all UL extensors, brachioradialis, supinator, AbdPL
Sensory distribution: skin of posterior arm, forearm and hand (lateral 31/2 digits), wrist and elbow joints

Question 3

Musculocutaneous (BIG 5)

Answer 3

Root value: C567
Motor distribution: coracobrachialis, biceps brachii, brachialis
Sensory distribution: skin of lateral forearm to base of thumb (via the lateral cutaneus nerve of the forearm), elbow joint

Question 4

Median (BIG 5)

Answer 4

Root value: C5678 T1
Motor distribution: FCR, PL, both pronators, FDS, FDP (lat), FPL, AbdPB, FPB, OppPoll, lat 2 lumbricals
Sensory distribution: skin of the lateral 3 1/2 digits and corresponding palm, wrist joint.

Question 5

Ulnar (BIG 5)

Answer 5

Root value: C8 T1
Motor distribution:FCU, FDP (medial), PB, AbdDM, FDM, OppDM, Med 2 lumbricals, add poll and all interossei.
Sensory distribution: skin of medial 1/2 digits, corresponding palm and wrist joint

Question 6

Dorsal scapular (branch from roots)

Answer 6

supplies levator scapulae, rhomboid major, rhomboid minor

Question 7

Long thoracic nerve (branch from roots)

Answer 7

supplies serratus anterior

Question 8

Suprascapular (branch from trunk)

Answer 8

supplies supraspinatus, infraspinatus

Question 9

Nerve to subclavicus (branch from trunk)

Answer 9

supplies subclavius

Question 10

Lower subscapular (branch from chords)

Answer 10

supplies subscapularis, teres major

Question 11

Thoracodorsal (branch from chords)

Answer 11

supplies latissimus dorsi

Question 12

Medial cutaneus of arm (branch from chords)

Answer 12

supplies skin over the medial (upper) arm

Question 13

Medial cutaneous of forearm (branch from chords)

Answer 13

supplies skin over medial forearm

Question 14

Medial pectoral (branch from chords)

Answer 14

supplies pec major, pec minor

Question 15

Lateral pectoral (branch from chords)

Answer 15

supplies pec major