upper extremity innervation and blood supply

Question 1

Trapezius

Answer 1

innervated by accesspry nerve (CN IX)

Blood supply: branches of thyrocervical trunk

Question 2

Levator scapulae

Answer 2

innervated by dorsal scapular nerve

Blood supply: dorsal scapular artery

Question 3

rhomboid major

Answer 3

innervated by dorsal scapular nerve

Blood supply: dorsal scapular artery

Question 4

rhomboid minor

Answer 4

innervated by dorsal scapular nerve

Blood supply: dorsal scapular artery

Question 5

Latissimus dorsi

Answer 5

innervated by thoracodorsal nerve

blood supply: throacodorsal artery

Question 6

supraspinatus

Answer 6

innervated by suprascapular nerve

blood supply: suprascapular artery

Question 7

infraspinatus

Answer 7

innervated by suprascapular nerve

blood supply: suprascapular artery and circumflex artery

Question 8

teres minor

Answer 8

innervated by axillary nerve

blood supply: circumflex scapular and posterior humeral circumflex arteries

Question 9

subscapularis

Answer 9

innervated by upper and lower scapular nerves

blood supply: subscapular artery

Question 10

Teres major

Answer 10

innervated by lower scapular nerve

blood supply: circumflex scapular and subscapular arteries

Question 11

deltoid

Answer 11

innervated by axillary nerve

blood supply: deltoid branch of the thoracoacromial artery and anterior and posterior humeral circumflex arteries

Question 12

pectoralis major

Answer 12

innervated by lateral and medial pectoral nerves

blood supply: thoracoacromial trunk (pectoral branch)

Question 13

pectoralis minor

Answer 13

innervated by medial pectoral nerve

blood supply: throacoacromial trunk (pectoral branch)

Question 14

subclavius

Answer 14

innervated by nerve to subclavius

blood supply: thoracoacromial trunk (clavicular branch)

Question 15

serratus anterior

Answer 15

innervated by long thoracic nerve

blood supply: lateral thoracic and thoracodorsal anteries

Question 16

coracobrachialis

Answer 16

innervated by musculocutaneous nerve

blood supply: brachial artery

Question 17

brachailis

Answer 17

innervated by musculocutaneous and radial nerves

blood supply: brachial artery

Question 18

biceps brachii

Answer 18

innervated by musculocutaneous nerve

blood supply: brachial artery

Question 19

triceps brachii

Answer 19

innervated by radial nerve

blood supply: profunda brachii artery (deep brachial artery)

Question 20

anconeus

Answer 20

innervated by radial nerve

blood supply: profunda brachii artery (deep brachial artery)

Question 21

Posterior compartment muscles

Answer 21

superficial: brachioradialis, extensor carpi radialis brevis, extensor carpi radialis longus, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris

Deep: supinator, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, and extensor indicis

Question 22

brachioradialis

Answer 22

innervated by radial nerve

blood supply: radial recurrent artery

Question 23

extensor carpi radialis brevis

Answer 23

innervated by radial nerve

blood supply: radial artery and radial recurrent artery

Question 24

extensor carpi radialis longus

Answer 24

innervated by radial nerve

blood supply: radial artery and radial recurrent artery

Question 25

extensor digitorum

Answer 25

innervated by radial nerve | blood supply: posterior interosseous artery

Question 26

extensor digiti minimi

Answer 26

innervated by radial nerve | blood supply: posterior interosseous artery

Question 27

extensor carpi ulnaris

Answer 27

innervated by radial nerve | blood supply: posterior interosseous artery

Question 28

supinator

Answer 28

innervated by radial nerve | blood supply: radial recurrent and posterior interosseous arteries

Question 29

abductor pollicis longus

Answer 29

innervated by radial nerve | blood supply: posterior interosseous artery

Question 30

extensor pollicis brevis

Answer 30

innervated by radial nerve | blood supply: posterior interosseous artery

Question 31

extensor pollicis longus

Answer 31

innervated by radial nerve | blood supply: posterior interosseous artery

Question 32

extensor indicis

Answer 32

innervated by radial nerve | blood supply: posterior interosseous artery

Question 33

anterior compartment forearm muscles

Answer 33

superficial: pronator teres, flexor carpi radialis, palmaris longus, and flexor carpi ulnaris Middle layer: flexor digitorum superficialis deep layer: flexor digitorum profundus, flexor pollicis longus, and pronator quadratus

Question 34

pronator teres

Answer 34

innervated by median nerve | blood supply: anterior ulnar recurrent artery

Question 35

flexor carpi radialis

Answer 35

innervated by median nerve | blood supply: radial artery

Question 36

palmaris longus

Answer 36

innervated by median nerve | blood supply: posterior ulnar recurrent artery

Question 37

flexor carpi ulnaris

Answer 37

innervated by ulnar nerve | blood supply: posterior ulnar recurrent artery

Question 38

flexor digitorum superficialis

Answer 38

innervated by median nerve | blood supply: ulnar and radial artery

Question 39

flexor digitorum profundus

Answer 39

innervated by median (lateral 1/2) and ulnar nerve (medial 1/2) blood supply: anterior interosseous artery and muscular branches of ulnar artery

Question 40

flexor pollicis longus

Answer 40

innervated by median nerve | blood supply: anterior interosseous artery

Question 41

pronator quadratus

Answer 41

innervated by median nerve | blood supply: anterior interosseous artery

Question 42

hand compartments

Answer 42

thenar, adductor, central, interosseous, and hypothenar

Question 43

thenar compartment muscles

Answer 43

flexor pollicis brevis (superficial and deep heads), adductor pollicis brevis, and opponens pollicis

Question 44

flexor pollicis brevis

Answer 44

superficial head innervated by median nerve; deep head innervated by ulnar nerve blood supply: superficial palmar arch

Question 45

abductor pollicis brevis

Answer 45

innervated by median nerve | blood supply: superficial palmar arch

Question 46

opponens pollicis

Answer 46

innervated by median nerve | blood supply: superficial palmar arch

Question 47

adductor compartment muscles

Answer 47

adductor pollicis (transverse and oblique heads)

Question 48

adductor pollicis

Answer 48

innervated by ulnar nerve | blood supply: deep palmar arch

Question 49

central compartment muscles

Answer 49

lumbricals 1-4

Question 50

lumbricals

Answer 50

1-2 innervated by median nerve; 3-4 innervated by ulnar nerve blood supply: superficial and deep palmar arches and digital arteries Action: Digits 2-5 MCP joints: Flexion PIP & DIP joints: Extension

Question 51

interosseous compartment muscles

Answer 51

palmar interossei (1-3) and dorsal interossei (1-4)

Question 52

palmar interossei

Answer 52

innervated by ulnar nerve blood supply: deep palmar arch (metacarpal arteries) ADduction of digits 2, 4, 5 (towards digit 3).

Question 53

dorsal interossei

Answer 53

innervated by ulnar nerve blood supply: deep palmar arch (metacarpal arteries) ABduction of digits 2-4 (digit 3 ABducts both medially and laterally)

Question 54

hypothenar compartment muscles

Answer 54

abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi

Question 55

abductor digiti minimi

Answer 55

innervated by ulnar nerve | blood supply: superficial palmar arch

Question 56

flexor digiti minimi brevis

Answer 56

innervated by ulnar nerve | blood supply: superficial palmar arch

Question 57

opponens digiti minimi

Answer 57

innervated by ulnar nerve | blood supply: superficial palmar arch