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GBE > The hand > Flashcards

The hand Flashcards

1
Q

What are the extrinsic muscles of the hand?

A 
(flexors)
flexor carpi radialis
palmaris longus
flexor carpi ulnaris
flexor digitorum superficialis 
(extensors)
extensor digitorum
extensor digiti minimi
extensor carpi ulnaris
extensor carpi radialis longus
extensor carpi radialis brevis
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2
Q

What are the thenar muscles of the hand

A

opponens pollicis
abductor pollicis brevis
flexor pollicis brevis
adductor pollicis

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3
Q

What are the hypothenar muscles of the hand

A

abductor digiti minimi
flexor digiti minimi brevis
opponens digiti minimi

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4
Q

What are the short muscles of the hand

A

lumbricals 1-4
dorsal interossei
palmar interossei

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5
Q

Describe opponens pollicis

A

O: flexor retinaculum + tubercles of scaphoid + trapezium
A: lateral side of 1st metacarpal
I: recurrent branch of median nerve (C8, T1)
Fn: opposes thumb

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6
Q

What is the origin of opponens pollicis

A

flexor retinaculum + tubercles of scaphoid + trapezium

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7
Q

What is the attachment of opponens pollicis

A

lateral side of 1st metacarpal

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8
Q

What is the innervation of opponens pollicis

A

recurrent branch of median nerve (C8, T1)

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9
Q

What is the fn of opponens pollicis

A

opposes thumb

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10
Q

Describe abductor pollicis brevis

A

O: flexor retinaculum + tubercles of scaphoid and trapezium
A: lateral side of base of prox. phalanx of thumb
I: recurrent branch of the median nerve (C8, T1)
Fn: abduction of thumb

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11
Q

What is the origin of abductor pollicis brevis

A

flexor retinaculum + tubercles of scaphoid and trapezium

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12
Q

What is the attachment of abductor pollicis brevis

A

lateral side of base of prox. phalanx of thumb

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13
Q

What is the innervation of abductor pollicis brevis

A

recurrent branch of the median nerve (C8, T1)

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14
Q

What is the function of abductor pollicis brevis

A

abduction of thumb

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15
Q

Describe flexor pollicis brevis

A

O: flexor retinaculum + tubercles of scaphoid and trapezium
A: lateral side of base of prox. phalanx of thumb
I: recurrent branch of median nerve (C8, T1)
Fn: flexes thumb

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16
Q

What is the attachment of flexor pollicis brevis

A

lateral side of base of prox phalanx of thumb

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17
Q

What is the origin of flexor pollicis brevis

A

flexor retinaculum + tubercles of scaphoid and trapezium

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18
Q

What is the innervation of flexor pollicis brevis

A

recurrent branch of the median nerve (C8, T1)

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19
Q

What is the function of flexor pollicis brevis?

A

flexion of thumb

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20
Q

Describe adductor pollicis

A

O: (oblique head) bases of 2nd and 3rd metacarpals
(transverse head) ant. surface of shaft of 3rd metacarpal
A: medial side of base of proximal phalanx of thumb
I: deep branch of ulnar nerve (C8, T1)
Fn:: adducts thumb

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21
Q

What is the origin of adductor pollicis

A

(oblique head) bases of 2nd and 3rd metacarpals

(transverse head) ant. surface of shaft of 3rd metacarpal

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22
Q

What is the attachment of adductor pollicis

A

medial side of base of proximal phalanx of thumb

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23
Q

What is the innervation of adductor pollicis ?

A

deep branch of ulnar nerve (C8, T1)

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24
Q

What is the function of adductor pollicis?

A

adduction

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25
Q

Describe abductor digiti minimi

A

O: pisiform
A: medial side of base of prox. phalanx of 5th metacarpal
I: deep branch of ulnar nerve (C8, T1)
Fn: abducts 5th finger

26
Q

What is the attachment of abductor digiti minimi

A

medial side of base of proximal phalanx of 5th metacarpal

27
Q

What is the origin of abductor digiti minimi

A

pisiform

28
Q

What is the innervation of abductor digiti minimi

A

deep branch of ulnar nerve (C8, T1)

29
Q

What is the function of abductor digiti minimi

A

abducts 5th finger

30
Q

Describe flexor digiti minimi brevis

A

O: hook of hamate
A: medial side of base of prox phalanx of 5th finger
I: deep branch of ulnar nerve (C8, T1)
Fn: flexes proximal phalanx at 5th finger

31
Q

What is the origin of flexor digiti minimi brevis

A

hook of hamate

32
Q

What is the attachment of flexor digiti minimi brevis

A

medial side of base of prox phalanx of 5th finger

33
Q

What is the innervation of flexor digiti minimi brevis

A

deep branch of ulnar neve (C8, T1)

34
Q

What is the function of flexor digiti minimi brevis

A

flexion of prox. phalanx at 5th finger

35
Q

Describe opponens digiti minimi

A

O: hook of hamate
A: medial border of 5th metacarpal
I: deep branch of ulnar nerve (C8, T1)
Fn: brings 5th finger anterior for opposition w/ thumb

36
Q

What is the origin of opponens digiti minimi

A

hook of hamate

37
Q

What is the attachment of opponens digiti minimi

A

medial border of 5th metacarpal

38
Q

What is the innervation of opponens digiti minimi

A

deep branch of ulnar nerve (C8, T1)

39
Q

What is the function of opponens digiti minimi

A

brings pinky anterior for opposition w/ thumb

40
Q

Describe lumbricals 1-2

A

O: lateral 2 tendons of flexor digitorum profundus
A: lateral sides of extensor expansions of 2-5 fingers
I: median nerve (C8, T1)
Fn: flex metacarpalphalangeal joints

41
Q

What is the origin of lumbricals 1-2

A

lateral 2 tendond of flexor digitorum profundus

42
Q

What is the attachment of lumbricals 1-2

A

lateral sides of extensor expansions of 2-5 fingers

43
Q

What is the innervation of lumbricals 1-2

A

median nerve (C8, T1)

44
Q

What is the function of lumbricals 1-2

A

flex metacarpalphalangeal joints

45
Q

Describe lumbricals 3-4

A

O: medial 3 tendons of flexor digitorum profundus
A: lateral sides of extensor expansions of 2-5 fingers
I: deep branch of ulnar nerve (C8, T1)
Fn: flex the metacarpalphalangeal joints

46
Q

What is the origin of lumbricals 3-4

A

medial 3 tendons of flexor digitorum profundus

47
Q

What is the attachment of lumbricals 3-4

A

lateral side of extensor expansions of 2-5 fingers

48
Q

What is the innervation of lumbricals 3-4

A

deep branch of ulnar nerve (C8, T1)

49
Q

What is the function of lumbricals 3-4

A

flex the metacarpalphalangeal joints

50
Q

Describe dorsal interossei

A

O: adjacent side of 2 metacarpals
A: bases of prox. phalanges
I: deep branch of ulnar nerve (C8, T1)
Fn: abduct 2nd to 4th fingers

51
Q

What is the origin of dorsal interossei

A

adjacent side of 2 metacarpals

52
Q

What is the attachment of dorsal interossei

A

bases of prox phalanges

53
Q

What is the innervation of dorsal interossei

A

deep branch of ulnar nerve (C8, T1)

54
Q

What is the function of dorsal interossei

A

abduction of 2nd-4th fingers

55
Q

Describe palmar interossei

A

O: palmar surfaces of 2nd, 4th and 5th metacarpals
A: bases of prox phalanges of 2nd, 4th and 5th metacarpals
I: deep branch of ulnar nerve (C8, T1)
Fn: adduct towards middle finger

56
Q

What is the origin of palmar interossei

A

palmar surfaces of 2nd, 4th and 5th metacarpals

57
Q

What is the attachment of palmar interossei

A

bases of prox phalanges of 2nd, 4th and 5th metacarpals

58
Q

What is the innervation of palmar interossei

A

deep branch of ulnar nerve (C8, T1)

59
Q

What is the function of palmar interossei

A

adduction towards middle finger

60
Q

How do you test palmar interossei

A

squeeze bit of paper between fingers and try and grip it

61
Q

How do you test dorsal interossei

A

try and abduct fingers against resistance

GBE (48 decks)

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