5 branches of the brachial plexus

Question 1

Innervations of median nerve Anterior forearm compartment

Answer 1

1. Pronator Teres 2. Flexor Carpi Radialis 3. Palmaris Longus, 4. Flexor digitorum superficialis, 5. lateral Flexor digitorum profundus 6. Flexor pollicis longus 7. Pronator quadratus

Question 2

innervations of the median nerve

Answer 2

1. Anterior compartment of the forearm (not FCUlnaris & FDProfundus med. 1/2) 2. 5 intrinsic thenar muscles (via recurrent branch of the median nerve) 3. palmar skin

Question 3

Anterior compartment of the forearm innervated by the median nerve

Answer 3

1. Pronator teres 2. Flexor digitorum superficialis, 3. Palmaris Longus, 4. Flexor Carpi Radialis, 5. Lateral 1/2 of Flexor Carpi Profundus, 6.Pronator quadratus, 7. Flexor pollicis longus

Question 4

Intrinsic thenar muscles innervated by the median nerve (recurrent branch)

Answer 4

1. Opponens Pollicis, 2. Abductor Pollicis brevis, 3. Flexor Pollicis brevis, 4. 1st & 2nd Lumbricals

Question 5

Ulnar nerve

Answer 5

1. Flexor Carpi Ulnaris
2. Medial 1/2 Flexor Carpi profundus
3. skin of hand medial to ring finger
4. deep Flexor pollicis brevis
5. Adductor pollicis
6. abductor digiti minimi
7. Flexor digiti minimi brevis
8. Opponens digiti
9. 3rd & 4th Lumbricals
10. Dorsal interossei 1-4
11. Palmar interossei

Question 6

Unlar nerve intrinsic hand muscles

Answer 6

1. Opponens digiti
2. Abductor digiti minimi
3. Adductor pollicis oblique & transverse
4. flexor digiti minimi brevis
5. 3rd & 4th Lumbricals
6. Dorsal interossei 1-4
7. Palmar interossei 1-3

Question 7

Ulnar nerve arm innervations

Answer 7

Flexor carpi ulnaris

med. 1/2 Flexor carpi profundus

Question 8

Ulnar nerve injury results in

Answer 8

Claw hand & sensory loss from ring finger medially

Question 9

Musculocutaneous innervations

Answer 9

anterior compartment of upper arm

biceps brachii, coracobrachialis, bracialis

lateral skin of the upper arm

Question 10

Radial nerve innervations

Answer 10

all muscles of the posterior compartment

1. Brachioradialis 2. Extensor Carpi Radialis Longus 3. Extensor Carpi Radialis Brevis 4. Extensor digitorum 5. Extensor digiti minimi 6. Extensor Carpi Ulnaris 7. Supinator 8. Extensor indicis 9. Abductor Pollicis Longus 10. Extensor Pollicis Brevis 11. Extensor Pollicis Longus