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620: Clinical Human Anatomy > Hand Muscles > Flashcards

Hand Muscles Flashcards

1
Q

Origin of Oppennes pollicis

A
  • Scaphoid tubercle

- Trapezium tubercle

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2
Q

Insertion of Oppennes pollicis

A

Lateral side of 1st metacarpal

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3
Q

What does the Oppennes pollicis do?

A

Opposes thumb

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4
Q

What innervates the Oppennes pollicis?

A

Median Nerve

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5
Q

Origin of Abductor Pollicis Brevis

A
  • Scaphoid Tubercle

- Trapezium Tubercle

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6
Q

Insertion of abductor Pollicis Brevis

A

Lateral side of base of proximal phalanx of thumb

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7
Q

What does the abductor Pollicis Brevis do?

A

Abducts thumb

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8
Q

What innervates the abductor pollicis brevis

A

Median Nerve

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9
Q

Origin of the flexor pollicis brevis

A
  • Scaphoid Tubercle

- Trapezium Tubercle

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10
Q

Insertion of the flexor pollicis brevis

A

Lateral side of base of proximal phalanx of thumb

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11
Q

What does the flexor pollicis brevis do?

A

flexes the thumb

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12
Q

What innervates the flexor pollicis brevis?

A

Ulnar Nerve

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13
Q

Origin of the adductor pollicis

A

bases of 2nd and 3rd metacarpals, capitate, and adjacent carpals
anterior surface of body of 3rd metacarpal

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14
Q

Insertion of the adductor pollicis

A

Medial side of base of proximal phalanx of thumb

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15
Q

What does the adductor pollicis do?

A

Adducts thumb toward lateral border of palm

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16
Q

What innervates the adductor pollicis?

A

Ulnar Nerve

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17
Q

Origin of the abductor digiti minimi

A

Pisiform

18
Q

insertion of the abductor digiti minimi

A

Medial side of base of proximal phalanx of little finger

19
Q

What does the abductor digiti minimi do?

A

Abducts pinky

20
Q

What is the abductor digiti minimi innervated by?

A

Ulnar Nerve

21
Q

Origin of the flexor digiti minimi

A
  • Hook of Hamate

- Flexor Retinaculum

22
Q

Insertion of the flexor digiti minimi

A

Medial side of base of proximal phalanx of little finger

23
Q

What does the flexor digiti minimi do?

A

Flexes proximal phalanx of little (5th) finger

24
Q

What innervates the flexor digiti minimi?

A

Ulnar nerve

25
Q

Origin of the opponens digiti minimi

A
  • Hook of Hamate

- Flexor Retinaculum

26
Q

Insertion of the opponens digiti minimi

A

Medial border of 5th metacarpal

27
Q

What does the opponens digiti minimi do?

A

Draws 5th metacarpal anteriorly and rotates it, bringing little finger (5th digit) into opposition with thumb

28
Q

What is the opponens digiti minimi innervated by?

A

Ulnar Nerve

29
Q

Origin of the palmar interosseous muscles

A

Palmar surfaces of 2nd, 4th and 5th metacarpals (as unipennate muscles)

30
Q

Insertion of the palmar interosseous muscles

A

Extensor expansions of digits and bases of proximal phalanges of 2nd, 4th, and 5th digits

31
Q

What do the palmar interosseous muscles do?

A

Adduct 2nd, 4th, and 5th digits toward axial line and assists the lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

32
Q

What are the palmar interosseous muscles innervated by?

A

Ulnar Nerve

33
Q

Origin of the dorsal interosseous muscles

A

Adjacent sides of two metacarpals (as bipennate muscles)

34
Q

Insertion of the dorsal interosseous muscles

A

Extensor expansions and bases of proximal phalanges of 2nd – 4th digits

35
Q

What do the dorsal interosseous muscles do?

A

Abduct 2nd – 4th digits from axial line and act with lumbricals to flex metacarpophalangeal joints and extend interphalangeal joints

36
Q

What are the dorsal interosseous muscles innervated by?

A

Ulnar Nerve

37
Q

Origin of the Lumbricals

A

Tendons of flexor digitorum profundus (palmar side of hand)

38
Q

Insertion of the Lumbricals

A

Lateral sides of extensor expansion of 2nd – 4th digits (dorsal side of hand)

39
Q

What do the lumbricasl do?

A

Finger flexion at the metacarpophalangeal jointand finger extension at the interphalangeal joint

40
Q

What innervates the lumbricals?

A

Median and Ulnar Nerves

620: Clinical Human Anatomy (29 decks)

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