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MSA > Hand & Wrist > Flashcards

Hand & Wrist Flashcards

1
Q

what tendons are in the superficial layer (4)

A

flexor carpi radialis, flexor carpi ulnaris, palmaris longus, pronator teres

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2
Q

what tendons are in the intermediate layer (1)

A

flexor digitorum superficialis

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3
Q

what tendons are in the deep layer (3)

A

flexor pollicis longus, flexor digitorum profundus, pronator quadratus

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4
Q

what muscles are involved in wrist extension (3)

A

extensor carpi radialis brevis, extensor carpi radialis longus, extensor carpi ulnaris

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5
Q

what muscles are involved with extending the fingers (3)

A

extensor digitorum, extensor digiti minimi, extensor indicis

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6
Q

what muscles are involved with extending the thumb (3)

A

abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus

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7
Q

what are the intrinsic hand muscles (3)

A

intermediate/short hand muscles, thenar eminence, hypothenar eminence

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8
Q

what 4 muscles are categorized as the thenar eminence

A

opponens pollicus, abductor pollicis brevis, flexor pollicis brevis, adductor pollicis

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9
Q

ORIGIN of the opponens pollicis

A

tubercle of trapezium and flexor retinaculum

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10
Q

INSERTION of the opponens pollicis

A

anterolateral aspect of the first metacarpal body

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11
Q

ACTION of the opponens pollicis

A

opposition of the thumb (flexion of CMC joint medially across the palm, abduction of CMC joint)

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12
Q

INNERVATION of the opponens pollicis

A

recurrent branch of the median nerve (c8-t1), and ulnar nerve (c8-t1)

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13
Q

ORIGIN of the abductor pollicis brevis

A

tubercle of scaphoid and trapezium, flexor retinaculum

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14
Q

INSERTION of the abductor pollicis brevis

A

radial side of the proximal phalanx base (thumb)

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15
Q

ACTION of the abductor pollicis brevis

A

adduction at CMC and MCP joints of thumb, assists thumb opposition and IP extension

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16
Q

INNERVATION of the abductor pollicis brevis

A

recurrent branch of median nerve (c8-t1)

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17
Q

ORIGIN of the flexor pollicis brevis

A

superficial head: crest of trapezium and flexor retinaculum
deep head: trapezoid and capitate bones, palmar ligaments of distal row of carpal bones

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18
Q

INSERTION of the flexor pollicis brevis

A

lateral side of proximal phalanx base

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19
Q

ACTION of the flexor pollicis brevis

A

flexion of MP and CMC joints of thumb, assists in thumb opposition

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20
Q

INNERVATION of the flexor pollicis brevis

A

superficial head: recurrent branch of median nerve (c8-t1)
deep head: ulnar nerve (c8-t1)

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21
Q

ORIGIN of the adductor pollicis

A

oblique head: bases of metacarpals 2-3, trapezoid and capitate
transverse head: anterior body of the third metacarpal

22
Q

INSERTION of the adductor pollicis

A

medial side of base of proximal phalanx of thumb, extensor retinaculum

23
Q

ACTION of the adductor pollicis

A

adduction of CMC joint of thumb, assists in thumb MCP adduction and flexion

24
Q

INNERVATION of the adductor pollicis

A

ulnar nerve (c8-t1)

25
Q

what muscles are categorized as in the hypothenar eminence (4)

A

opponens digiti minimi, abductor digiti minimi, flexor digiti minimi, palmaris brevis (sometimes)

26
Q

ORIGIN of the opponens digiti minimi

A

hook of hamate, flexor retinaculum

27
Q

INSERTION of the opponens digiti minimi

A

medial border of metacarpal five

28
Q

ACTION of the opponens digiti minimi

A

opposition of little finger to thumb (adduction, flexion, lateral rotation)

29
Q

INNERVATION of the opponens digiti minimi

A

deep branch of ulnar nerve (c8-t1)

30
Q

ORIGIN of the abductor digiti minimi

A

the pisiform

31
Q

INSERTION of the abductor digiti minimi

A

medial side of proximal phalanx base of digit five, dorsal expansion of extensor digiti minimi

32
Q

ACTION of the abductor digiti minimi

A

abduction of digit five, assists opposition with digit five

33
Q

INNERVATION of the abductor digiti minimi

A

ulnar nerve (c8-t1)

34
Q

ORIGIN of the flexor digiti minimi brevis

A

hook of the hamate and flexor retinaculum

35
Q

INSERTION of the flexor digiti minimi brevis

A

medial side of proximal phalanx of digit five

36
Q

ACTION of the flexor digiti minimi brevis

A

flex and laterally rotate the 5th metacarpal about the 5th CMC joint, assists opposition in digit five

37
Q

INNERVATION of the flexor digiti minimi brevis

A

ulnar nerve (c8-t1)

38
Q

what are the two intermediate (short muscles), how do we describe them?

A

lumbricals (flex MCP with IP extended), interossei (palmar and dorsal, adduction or abduction of some fingers, flexion of MCP with IP extended

39
Q

ORIGIN of the lumbricals

A

single head from radial side of FDP 1+2, 3+4 from adjacent sides

40
Q

INSERTION of the lumbricals

A

lateral side of extensor expansion

41
Q

ACTION of the lumbricals

A

flex the MCP joints and extend the PIP and DIP joints, coordinating with other hand muscles

42
Q

INNERVATION of the lumbricals

A

1+2: median nerve
3+4: ulnar nerve

43
Q

ACTION of the dorsal interossei

A

to abduct fingers around digit 3, flex MCP while extending IPs and the ulnar nerve

44
Q

ORIGIN of the palmar interossei

A

shaft of metacarpals 2, 4 and 5 (capitate and hamate)

45
Q

INSERTION of the palmar interossei

A

bases of proximal phalanxes 2, 4 and 5, extensor expansions

46
Q

ACTION of the palmar interossei

A

adduct fingers forward

47
Q

INNERVATION of the palmar interossei

A

ulnar nerve (c8-t1)

48
Q

where do the flexor carpi ulnaris and abductor digiti minimi attach to on the pisiform

A

the volar surface

49
Q

what is jersey finger classified as

A

injury to a FDP tendon at its point of attachment-the distal phalanx
causes partial or complete rupture of the FDP tendon near its attachment point

50
Q

what is mallet finger

A

finger deformity caused when the extensor tendon is damaged

51
Q

what is carpal tunnel syndrome

A

compression of the median nerve which goes through the carpal tunnel in the wrist, causes tingling, numbness and pain

MSA (13 decks)

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