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Clinical Anatomy > Hand Muscles (Thenar and Hypothenar) > Flashcards

Hand Muscles (Thenar and Hypothenar) Flashcards

1
Q

Action of Abductor Digiti Minimi

A

Abducts 5th digit

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2
Q

Action of Abductor Pollicis Brevis

A

Abducts thumb and helps oppose it

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2
Q

Action of Adductor Pollicis

A

Adducts thumb toward middle digit

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3
Q

Action of Flexor Digiti Minimi

A

Flexes proximal phalanx of 5th digit

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3
Q

Action of Dorsal Interossei 1-4

A

Abduct digits from axial line and act with lumbricals to flex metacarpophalangeal joints and extend interphalangeal joints

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4
Q

Action of Flexor Pollicis Brevis

A

Flexes thumb

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5
Q

Action of Lumbricals 1 and 2

A

Flex digits and metacarpophalangeal joints and extend interphalangeal joints

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5
Q

Action of Lumbricals 3 and 4

A

Flex digits at metacarpophalangeal joints and extend interphalangeal joints

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6
Q

Action of Opponens Pollicis

A

Opposition, medial rotations

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6
Q

Action of Opponens Digiti Minimi

A

Opposition of 5th digit

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7
Q

Action of Palmar Interossei 1-4

A

Adduct digits toward axial line and assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

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8
Q

Innervation of Abductor Digiti Minimi

A

Deep branch of ulnar nerve (C8-T1)

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9
Q

Innervation of Abductor Pollicis Brevis

A

Recurrent branch of median nerve (C8-T1)

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9
Q

Innervation of Adductor Pollicis

A

Deep branch of ulnar nerve

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10
Q

Innervation of Dorsal Interossei 1-4

A

Deep branch of ulnar nerve (C8-T1)

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11
Q

Innervation of Flexor Digiti Minimi

A

Deep branch of the ulnar nerve (C8-T1)

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13
Q

Innervation of Flexor Pollicis Brevis

A

Recurrent branch of the median nerve (C8-T1)

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14
Q

Innervation of Lumbricals 1 and 2

A

Median Nerve (C8-T1)

15
Q

Innervation of Opponens Digiti Minimi

A

Deep branch of ulnar nerve (C8-T1)

15
Q

Innervation of Lumbricals 3 and 4

A

Deep branch of ulnar nerve (C8-T1)

16
Q

Innervation of Opponens Pollicis

A

Recurrent branch of the median nerve (C8-T1)

17
Q

Innervation of Palmar Interossei 1-4

A

Deep branch of ulnar nerve (C8-T1)

19
Q

Insertion of Abductor Digiti Minimi

A

Medial side of base of proximal phalanx of 5th digit

20
Q

Insertion of Abductor Pollicis Brevis

A

Lateral side of base proximal phalanx of thumb

21
Q

Insertion of Adductor Pollicis

A

Medial side of base of proximal phalanx of thumb

22
Q

Insertion of Dorsal Interossei 1-4

A

Extensor expansions and bases of proximal phalanges of digits 2-4

23
Q

Insertion of Flexor Digiti Minimi

A

Medial side of base of proximal phalanx of 5th digit

24
Q

Insertion of Flexor Pollicis Brevis

A

Lateral side of base proximal phalanx of thumb

26
Q

Insertion of Opponens Digiti Minimi

A

Medial border of 5th metacarpal

27
Q

Insertion of Opponens Pollicis

A

Lateral side of 1st metacarpal

27
Q

Insertion of Palmar Interossei 1-4

A

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

29
Q

Insertions of Lumbricals 1 and 2

A

Lateral side of extensor expansions of digits 1 and 2

30
Q

Insertions of Lumbricals 3 and 4

A

Lateral side of extensor expansions of digits 4 and 5

32
Q

Origin of Abductor Digiti Minimi

A

Pisiform

33
Q

Origin of Abductor Pollicis Brevis

A

Flexor retinaculum and tubercles of scaphoid and trapezium

34
Q

Origin of Adductor Pollicis

A

Oblique head: bases of 2nd and 3rd metacarpals, capitate, and adjacent carpals Transverse Head: anterior surface of body of 3rd metacarpal

36
Q

Origin of Flexor Digiti Minimi

A

Hook of Hamate, flexor retinaculum

38
Q

Origin of Flexor Pollicis Brevis

A

Flexor retinaculum and tubercles of scaphoid and trapezium

39
Q

Origin of Opponens Digiti Minimi

A

Hook of hamate, flexor retinaculum

40
Q

Origin of Dorsal Interossei 1-4

A

Adjacent sides of two metacarpals

41
Q

Origin of Opponens Pollicis

A

Flexor retinaculum and tubercles of scaphoid and trapezium

42
Q

Origin of Palmar Interossei 1-4

A

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

43
Q

Origins Lumbricals 3 and 4

A

Medial three tendons of flexor digitorum profundus

44
Q

Origins of Lumbricals 1 and 2

A

Lateral two tendons of flexor digitorum profundus

Clinical Anatomy (7 decks)

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