Wrist and hand Flashcards

1
Q

Innervation for muscles of anterior arm

A

musculocutaneous

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2
Q

Innervation for muscles of posterior arm

A

radial

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3
Q

Innervation for muscles of anterior forearm

A

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

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4
Q

Innervation for muscles of posterior forearm

A

radial

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5
Q

Innervation for muscles of thenar eminence

A

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

median

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6
Q

Innervation for muscles of hypothenar eminence

A

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

median

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7
Q

Innervation for muscles of palm

A

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

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

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8
Q

flexor carpi radialis

A

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

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9
Q

flexor carpi ulnaris

A

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

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10
Q

flexor digitorum superficialis

A

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

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11
Q

palmaris longus

A

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

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12
Q

flexor digitorum profundus

A

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

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13
Q

flexor pollicis longus

A

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

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14
Q

extensor carpi radialis longus

A

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

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15
Q

extensor carpi radialis brevis

A

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

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16
Q

extensor digitorum

A

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

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17
Q

extensor digiti minimi

A

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

18
Q

extensor carpi ulnaris

A

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

19
Q

abductor pollicis longus

A

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

20
Q

extensor pollicis longus

A

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

21
Q

extensor pollicis brevis

A

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

22
Q

extensor indicus

A

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

23
Q

abductor pollicis brevis

A

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

24
Q

flexor pollicis brevis

A

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

25
Q

opponens pollicis

A

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

26
Q

palmaris brevis

A

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

27
Q

abductor digiti minimi

A

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

28
Q

flexor digiti minimi brevis

A

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

29
Q

opponens digiti minimi

A

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

30
Q

adductor pollicis

A

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

31
Q

lumbricals

A

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

32
Q

palmar interossei

A

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

33
Q

dorsal interossei

A

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

34
Q

Radial nerve innervates

A

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
35
Q

Ulnar nerve innervates

A

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)
36
Q

Median nerve innervates

A
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

37
Q

Musculocutaneous nerve innervates

A

biceps brachii
brachialis
coracobrachialis

38
Q

Axillary nerve innervates

A

deltoid

teres minor

39
Q

Dorsal scapular nerve innervates

A

levator scapulae

rhomboid major and minor

40
Q

Long thoracic nerve innervates

A

serratus anterior

41
Q

Suprascapular nerve innervates

A

supraspinatus

infraspinatus