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*** Muscles *** > Hand > Flashcards

Hand Flashcards

1
Q

3 groups of hand muscles

A

Thenar
Hypothenar
Central

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2
Q

Thenar muscle innervation

A

Median nerve

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3
Q

Thenar muscles

A

Opponens pollicis
Flexor pollicis brevis
Abductor pollicis brevis

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4
Q

Opponens pollicis

Origin

A

Tubercle of the trapezium

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5
Q

Opponens pollicis

Insertion

A

Lateral margin of the metacarpal of the thumb

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6
Q

Opponens pollicis

Innervation

A

Median nerve

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7
Q

Opponens pollicis

Function

A

Abducts the thumb

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8
Q

Flexor pollicis brevis

Origin

A

Tubercle of the trapezium

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9
Q

Flexor pollicis brevis

Insertion

A

Base of the proximal phalanx of thumb

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10
Q

Flexor pollicis brevis

Innervation

A 
Median nerve
(Deep head = ulnar nerve)
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11
Q

Flexor pollicis brevis

Function

A

Flexes the MCPJ

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12
Q

Abductor pollicis brevis

Origin

A

Tubercle of trapezium and scaphoid

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13
Q

Abductor pollicis brevis

Insertion

A

Lateral side of proximal phalanx of thumb

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14
Q

Abductor pollicis brevis

Innervation

A

Median nerve

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15
Q

Abductor pollicis brevis

Function

A

Abducts the thumb

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16
Q

Thypothenar muscle innervation

A

Ulnar nerve

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17
Q

Hypothenar muscles

A

Opponens digiti minimi
Abductor digiti minimi
Flexor digiti minimi

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18
Q

Opponens digiti minimi

Origin

A

Hook of hamate

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19
Q

Opponens digiti minimi

Insertion

A

Medial margin of metacarpal V

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20
Q

Opponens digiti minimi

Innervation

A

Ulnar nerve

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21
Q

Opponens digiti minimi

Function

A

Rotates little finger towards palm (provides opposition)

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22
Q

Abductor digiti minimi

Origin

A

Pisiform

Tendon of flexor carpi ulnaris

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23
Q

Abductor digiti minimi

Insertion

A

Base of proximal phalanx of little finger

24
Q

Abductor digiti minimi

Innervation

A

Ulnar nerve

25
Q

Abductor digiti minimi

Function

A

Abducts little finger

26
Q

Flexor digiti minimi

Origin

A

Hook of hamate

27
Q

Flexor digiti minimi

Insertion

A

Base of proximal phalanx of little finger

28
Q

Flexor digiti minimi

Innervation

A

Ulnar nerve

29
Q

Flexor digiti minimi

Function

A

Flexes the MCPJ

30
Q

Central muscles innervation

A

Innervated by ulnar nerve (except lateral 2 lumbricals = median nerve)

31
Q

Central muscles

A 
Lumbricals (x4)
Dorsal interossei (x4)
Palmar interossei (x3)
Palmaris brevis
Adductor pollicis (radial artery passes between the 2 heads)
32
Q

Lumbricals

Number

A

4

33
Q

Lumbricals

Origin

A

Tendon of flexor digitorum profundus

34
Q

Lumbricals

Insertion

A

Extensor hood of each finger

35
Q

Lumbricals

Innervation

A

Lateral 2 = median nerve

Medial 2 = ulnar nerve

36
Q

Lumbricals

Function

A

Flex at MCPJ

Extend at IPJ

37
Q

Dorsal interossei

Number

A

4

38
Q

Dorsal interossei

Origin

A

Lateral and medial surfaces of the metacarpals

39
Q

Dorsal interossei

Insertion

A

Extensor hood and proximal phalanx of each finger

40
Q

Dorsal interossei

Innervation

A

Ulnar nerve

41
Q

Dorsal interossei

Function

A

Abducts fingers at MCPJ

42
Q

Palmar interossei

Number

A

3

43
Q

Palmar interossei

Origin

A

Medial or lateral surface of metacarpals

44
Q

Palmar interossei

Insertion

A

Extensor hood and proximal phalanx of the same fingers

45
Q

Palmar interossei

Innervation

A

Ulnar nerve

46
Q

Palmar interossei

Function

A

Adduct fingers at MCPJ

47
Q

Palmaris brevis

Origin

A

Palmar aponeurosis and flexor retinaculum

48
Q

Palmaris brevis

Insertion

A

Dermis on medial side of hand

49
Q

Palmaris brevis

Innervation

A

Ulnar nerve

50
Q

Palmaris brevis

Function

A

Deepens curvature of hand improving grip

Wrinkles skin

51
Q

Adductor pollicis

Radial artery

A

Radial artery passes between the 2 heads

52
Q

Adductor pollicis

Origin

A

Metacarpal III

Capitate

53
Q

Adductor pollicis

Insertion

A

Base of proximal phalanx of thumb

54
Q

Adductor pollicis

Innervation

A

Ulnar nerve

55
Q

Adductor pollicis

Function

A

Adducts thumb

*** Muscles *** (9 decks)

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