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MSK Final > Hand > Flashcards

Hand Flashcards

1
Q

movements possible at the digits

A

flexion/extension at MP/IP joints

Abduction and Adduction

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2
Q

movements possible at the thumb

A

flexion/extension
adduction/abduction
opposition

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3
Q

synovial sheaths cover the tendons of

A

flexor digitorum superficialis m

flexor digitorum profundus m

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4
Q

5th distal synovial sheath is continuous with

A

ulnar bursa

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5
Q

the anatomical snuffbox contains the

A

radial a as it enters the palm of the hand to become deep palmar arch

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6
Q

the superficial palmar arch originates form the

A

ulnar a

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7
Q

the deep palmar arch originates form the

A

radial a .

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8
Q

the princeps pollicis a to the thumb and the radialis indicies to the index finger both originate from

A

the deep palmar arch, a branch of the radial a

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9
Q

lumbricals insert onto

A

the extensor hood

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10
Q

lumbricals can assist in two motions of the digits

A

weak flexion and extension (because they insert onto the extensor hood)

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11
Q

the superficial innervation of the ulnar n includes these two digits

A

fourth and fifth digits up to the wrist (palmar and dorsal)

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12
Q

the cutaneous innervation of the radial n covers

A

the dorsal surface of the hand from wrist up to the distal phalange on 1st-3rd digits

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13
Q

fascia of wrist and hand

A

palmar aponeurosis

transverse carpal ligament

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14
Q

Dupuytren’s contracture

A

thickening of fibrous tissue underneath the skin of the palm
painless - associated with alcohol, diabetes, aging
see wrinkles at creases and when fingers are flexed
can reach point of restricting opening of hand

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15
Q

superficial muscles of the palm

A 
abductor digiti minimi 
flexor digiti minimi brevis 
lumbricals 
adductor pollicis 
flexor pollicis brevis
abductor pollicis brevis
opponens pollicis
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16
Q

deep muscles of the hand (dorsal side)

A

opponens pollicis
adductor pollicis
opponens digiti minimi

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17
Q

midline of hand is which digit

A

3rd digit

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18
Q

palmar interosseous muscles perform what actions on which digits

A

PAD - adduction
2nd
4th
5th

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19
Q

dorsal interosseous muscles perform what actions on which digits

A

DAB - abduction
2nd digit - 1st and 2nd DAB
4th
5th

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20
Q

thenar group muscles

A

abductor pollicis brevis
opponens pollicis m
flexor pollicis brevis m
adductor pollicis m

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21
Q

origin/insertion of abductor pollicis brevis m

A

transverse carpal ligament, scaphoid, trapezium to radial base of proximal phalanx of thumb

22
Q

action of abductor pollicis brevis

A

abduction of thumb (assists in opposition and extension

23
Q

innervation of abductor pollicis brevis

A

recurrent branch of the median n

24
Q

origin/insertion of opponens pollicis m

A

traperzium and transverse carpal ligament to metacarpal bone of thumb

25
Q

action of opponens pollicis m

A

flexion of thumb metacarpal – opposition

26
Q

innervation of opponens pollicis m

A

recurrent branch of median n

27
Q

origin/insertion of flexor pollicis brevis m

A

trapezium, flexor retinaculum to proximal phalanx of thumb

28
Q

action of flexor pollicis brevis m

A

flexes thumb at first MCP joint

29
Q

innervation of flexor pollicis brevis m

A

superficial head: recurrent branch of median n

deep head: deep branch of ulnar n

30
Q

flexor pollicis brevis m two heads and innervation

A

superficial head is innervated by recurrent branch of median n
deep head is innervate by the deep branch of ulnar n

31
Q

origin/insertion of adductor pollicis m

A

transverse head: third metacarpal
oblique head: bases of 2 and 3 metacarpal and adjacent trapezoid and capitate bones to
proximal phalanx of thumb and ulnar sesamoid

32
Q

actions of adductor pollicis m

A

adducts thumb at carpometacarpal joint

33
Q

innervation of adductor pollicis m

A

deep branch of ulnar n

34
Q

muscles within the hypothenar group and their innervation

A

abductor digiti minimi
flexor digiti minimi brevis m
opponens digiti minimi m
All innervated by ulnar n

35
Q

origin/insertion of abductor digiti minimi m

A

pisiform to proximal phalanx of 5th digit

36
Q

action of abductor digiti minimi

A

abducts 5th digit, assists in flexion

37
Q

innervation of abductor digiti minimi

A

ulnar n

38
Q

origin/insertion of flexor digiti minimi brevis m

A

hamulus (hook of hamate) and flexor retinaculum to proximal phalanx of 5th digit

39
Q

action of flexor digiti minimi brevis m

A

flexes proximal phalanx of 5th digit

40
Q

innervation of flexor digiti minimi brevis

A

ulnar n

41
Q

origin/insertion of opponens digiti minimi m

A

hamulus (hook of hamate) and flexor retinaculum to medial 5th metacarpal

42
Q

actions of opponens digiti minimi m

A

brings opposition to thumb

43
Q

innervation of opponens digiti minimi m

A

ulnar n

44
Q

deep intrinsic muscles of the hand

A

lumbrical m (4)
PAD
DAB

45
Q

radial a gives rise to which arches

A

deep palmar arch
(princeps pollicis a, radialis indicis a)
superficial palmar arch of radial a

46
Q

ulnar a gives rise to which arch

A

superficial palmar arch

–> common palmar digital a –> proper palmar digitial a

47
Q

what two arteries make up the dorsal carpal arch

A

radial a and anterior interosseous a (from ulnar)

48
Q

median n innervates the muscles of the thenar group except

A

adductor pollicis m

deep head of flexor pollicis brevis m

49
Q

Lumbricals 1,2 innervated by what n

A

median n

50
Q

the hypothenar group is innervated by which n

A

ulnar n

51
Q

the intrinsic hand muscles are innervated by

A

the deep branch of the ulnar n

52
Q

T/F the only innervation on dorsum of the hand is sensory

A

t

MSK Final (21 decks)

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