Upper Extremity Week 2 Structure Information: Branches of Peripheral Nerves

Question 1

Median nerve branches

Answer 1

Anterior interosseous nerve: M/S/P to flexor pollicis longus, flexor digitorum profundus (digits 2-3), pronator quadratus

Palmar cutaneous branch: S/P to the skin overlying the radial aspect of the palm of the hand

Recurrent branch of the median nerve: M/S/P to flexor pollicis brevis, abductor pollicis brevis, and opponens pollicis muscles

Common and proper palmar digital nerves: S/P to skin overlying digits 1-4

Question 2

Medial cord branches

Answer 2

Medial pectoral nerve

Medial cutaneous nerves of the arm and forearm: S/P to skin overlying the medial aspect of the arm and forearm

Medial root of the median nerve: see median nerve

Question 3

Lateral cord branches

Answer 3

Lateral pectoral nerve

MUSCULOCUTANEOUS NERVE: Lateral cutaneous nerve of forearm: S/P to skin overlying the lateral aspect of the forearm

Lateral root of the median nerve: see median nerve

Question 4

Ulnar nerve branches

Answer 4

Palmar cutaneous branch: S/P to skin overlying the ulnar side of the palm

• Common palmar digital nerves (supplying digits 4&5)
• • proper palmar digital nerves

Dorsal cutaneous branch: S/P to skin overlying the dorsal surfaces of digits 4&5

Deep (terminal) branch: muscles of the hand

Question 5

Posterior cord branches

Answer 5

Upper subscapular nerve
Thoracodorsal nerve
Lower subscapular nerve
Axillary nerve: see axillary nerve
Radial nerve: see radial nerve

Question 6

Axillary nerve branches

Answer 6

Superior lateral cutaneous nerve of the arm: S/P to skin overlying the superior lateral aspect of the arm

Question 7

Radial nerve branches

Answer 7

Deep and posterior interosseous muscular branches

Posterior cutaneous nerve of the forearm: S/P to skin overlying posterior aspect of the forearm

Superficial (terminal) branch: S/P to skin overlying the radial side of the dorsum of the hand