Wrist and hand

Question 1

Innervation for muscles of anterior arm

Answer 1

musculocutaneous

Question 2

Innervation for muscles of posterior arm

Answer 2

radial

Question 3

Innervation for muscles of anterior forearm

Answer 3

median (except for flexor carpi ulnaris and the medial 1/2 of flexor digitorum profundus which use the ulnar nerve)

Question 4

Innervation for muscles of posterior forearm

Answer 4

radial

Question 5

Innervation for muscles of thenar eminence

Answer 5

(muscles of thenar eminence: abductor pollicis brevis, flexor pollicis brevis, opponens pollicis)

median

Question 6

Innervation for muscles of hypothenar eminence

Answer 6

(muscles of hypothenar eminence: palmaris brevis, abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi)

median

Question 7

Innervation for muscles of palm

Answer 7

(muscles of palm: adductor pollicis, lumbricals, palmar interossei, dorsal interossei)

ulnar except for lumbricals 1-2, which are innervated by the median nerve

Question 8

flexor carpi radialis

Answer 8

O: med epicondyle
I: base 2nd metacarpal
A: flex and abduct hand
Inn: median nerve

Question 9

flexor carpi ulnaris

Answer 9

O: humeral head - med epicondyle
O: ulnar head - olecranon and post border ulna
I: pisiform hook of hamate, 5th metacarpal bones
A: flex and adduct hand
Inn: ulnar

Question 10

flexor digitorum superficialis

Answer 10

O: humeroulnar head - med epicondyle, ulnar collateral l., coronoid p. of ulna
O: radial head - sup 1/2 ant border of radius
I: bodies of middle phalanges, digits 2-5
A: flex middle phalanges, prox phalange and hand
Inn: median

Question 11

palmaris longus

Answer 11

O: med epicondyle
I: distal 1/2 flexor retinaculum and palmar aponeurosis
A: flex hand, tighten palmar aponeurosis
Inn: median

Question 12

flexor digitorum profundus

Answer 12

O: med & ant surface of ulna and interosseous membrane
I: base distal phalange, digits 2-5
A: flex distal phalanges of digits 2-5
Inn: median nerve for lateral half, ulnar nerve for medial half

Question 13

flexor pollicis longus

Answer 13

O: ant surface radius and adj interosseous membrane
I: base distal phalanx 1st digit
A: flex thumb
Inn: median

Question 14

extensor carpi radialis longus

Answer 14

O: lat supracondylar ridge of humerus
I: base 2nd metacarpal
A: extend and abduct hand at wrist
Inn: radial

Question 15

extensor carpi radialis brevis

Answer 15

O: lat epicondyle
I: base 3rd metacarpal
A: extend and abduct hand at wrist
Inn: radial

Question 16

extensor digitorum

Answer 16

O: lateral epicondyle
I: ext expansions of digits 2-5
A: extends digits 2-5 at MCP joint and extend hand at wrist
Inn: radial

Question 17

extensor digiti minimi

Answer 17

O: lat epicondyle
I: ext expansion of digit 5
A: extend 5th digit at MCP and interphalangeal joints
Inn: radial

Question 18

extensor carpi ulnaris

Answer 18

O: lat epicondyle and post border of ulna
I: base 5th metacarpal
A: extend and adduct hand at wrist
Inn: radial

Question 19

abductor pollicis longus

Answer 19

O: post radius, ulna and interosseus memb.
I: base 1st metacarpal
A: abduct 1st digit and extends at carpometacarpal joint
Inn: radial

Question 20

extensor pollicis longus

Answer 20

O: post surface ulna and interosseous memb
I: base dist phalanx, 1st digit
A: extend 1st digit at MCP and interphalangeal joints
Inn: radial

Question 21

extensor pollicis brevis

Answer 21

O: post surface radius and interosseous membrane
I: base prox phalanx, 1st digit
A: extend 1st digit at carpometacarpal and MCP joints
Inn: radial

Question 22

extensor indicus

Answer 22

O: post surface ulna and interosseous membranes
I: ext expansion of 2nd digit
A: extend 2nd digit, helps extend hand
Inn: radial

Question 23

abductor pollicis brevis

Answer 23

O: flexor retinaculum and tubercles of scaphoid and trapezium
I: lat side, base of proximal phalanx of 1st digit
A: abducts thumb, opposition
Inn: median

Question 24

flexor pollicis brevis

Answer 24

O: flexor retinaculum and tubercle of trapezium
I: lat side 1st metacarpal
A: flex thumb
Inn: median

Question 25

opponens pollicis

Answer 25

O: flexor retinaculum and tubercle of trapezium I: lat side 1st metacarpal A: median Inn: median

Question 26

palmaris brevis

Answer 26

O: flexor retinaculum and palmar aponeurosis I: skin of medial palm A: wrinkles skin on med palm, deepens hollow of palm, aids grip Inn: ulnar

Question 27

abductor digiti minimi

Answer 27

O: pisiform I: med base prox phalanx of 5th digit A: abducts 5th digit Inn: ulnar

Question 28

flexor digiti minimi brevis

Answer 28

O: hook of hamate, flexor retinaculum I: med base prox phalanx of 5th digit A: flex prox phalanx of 5th digit Inn: ulnar

Question 29

opponens digiti minimi

Answer 29

O: hook of hamate, flexor retinaculum I: med border 5th metacarpal A: draws 5th metacarpal ant and rotates it lat to bring 5th digit in opposition w/ thumb Inn: ulnar

Question 30

adductor pollicis

Answer 30

O: oblique head - capitate, bases of 2nd and 3rd metacarpals O: transverse head - body of 3rd metacarpal I: med side base prox phalanx of 1st digit A: adduct thumb Inn: ulnar

Question 31

lumbricals

Answer 31

O: 1-2 - lateral 2 tendons of flex digitorum profundus O: 3-4 - med 3 tendons of flex digitorum profundus I: radial side of the extensor expansion (on dorsum of proximal phalanx after passing along the lateral side of the MCP joints) Inn: 1-2 by median, 3-4 by ulnar

Question 32

palmar interossei

Answer 32

O: palmar surfaces of 2,4, 5th metacarpals I: extensor expansions and bases of prox phalanges 2,4,5 A: adducts digits, extend interphalangeal joints, flex MCP joint Inn: ulnar

Question 33

dorsal interossei

Answer 33

O: adj sides of 2 metacarpal bones I: extensor expansions and bases of prox phalanges digits 2-4 A: abduct digits, and with lumbricals helps extend interphalangeal joints, flex MCP joint Inn: ulnar

Question 34

Radial nerve innervates

Answer 34

brachioradialis extensor carpi radialis longus anconeus triceps ``` supinator extensor carpi radialis brevis extensor digitorum extensor digiti minimi extensor carpi ulnaris abductor pollicis longus extensor pollicis longus extensor pollicis brevis extensor indices ```

Question 35

Ulnar nerve innervates

Answer 35

flexor carpi ulnaris flexor digitorum profundus ``` flexor & abductor digiti minimi brevis opponens digiti minimi lumbricals 3, 4 interossei adductor pollicis flexor pollicis brevis (ulnar portion) ```

Question 36

Median nerve innervates

Answer 36

``` pronator teres flexor carpi radialis palmaris longus flexor digitorum superficialis flexor digitorum profundus flexor pollicis longus pronator quadratus ``` abductor pollicis brevis opponens pollicis and flexor pollicis brevis lumbricals 1, 2

Question 37

Musculocutaneous nerve innervates

Answer 37

biceps brachii brachialis coracobrachialis

Question 38

Axillary nerve innervates

Answer 38

deltoid | teres minor

Question 39

Dorsal scapular nerve innervates

Answer 39

levator scapulae | rhomboid major and minor

Question 40

Long thoracic nerve innervates

Answer 40

serratus anterior

Question 41

Suprascapular nerve innervates

Answer 41

supraspinatus | infraspinatus