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Upper Limb > Intrinsic Muscles of Hand > Flashcards

Intrinsic Muscles of Hand Flashcards

0
Q

Opponens Policis

Insertion

A

Lateral side of 1st metacarpal

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1
Q

Opponens Policis

Origin

A

Flexor retinaculum and tubercle of scaphoid and trapezium

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2
Q

Opponens Pollicis

Innervation

A

Recurrent branch of median nerve (C8, T1)

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3
Q

Opponens Pollicis

Actions

A

To oppose thumb, it draws 1st metacarpal medially to center of palm and rotates it medially

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4
Q

Abductor Pollicis Brevis

Origin

A

Flexor retinaculum and tubercles of scaphoid and trapezium

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5
Q

Abductor Pollicis Brevis

Insertion

A

Lateral side of base of proximal phalanx of thumb

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6
Q

Abductor Pollicis Brevis

Innervation

A

Recurrent branch of median nerve (C8, T1)

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7
Q

Abductor Pollicis Brevis

Actions

A

Abducts thumb; helps oppose it

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8
Q

Flexor Pollicis Brevis
Superficial Head
Deep Head

A

Flexor retinaculum and tubercles of scaphoid and trapezium

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9
Q

Flexor Pollicis Brevis

Insertion

A

Lateral side of base of proximal phalanx of thumb

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10
Q

Flexor Pollicis Brevis

Innervation

A

Recurrent branch of median nerve (C8, T1)

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11
Q

Flexor Pollicis Brevis

Actions

A

Flexes thumb

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12
Q

Adductor Pollicis
Oblique Head
Transverse Head

A

Bases of 2nd and 3rd metacarpals, capitate, adjacent carpals

Anterior surface of shaft of 3rd metacarpal

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13
Q

Adductor Pollicis

Insertion

A

Medial side of base of proximal phalanx of thumb

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14
Q

Adductor Pollicis

Innervation

A

Deep branch of ulnar nerve (C8, T1)

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15
Q

Adductor Pollicis

Actions

A

Adducts thumb toward lateral border of palm

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16
Q

Abductor Digiti Minimi

Origin

17
Q

Abductor Digiti Minimi

Insertion

A

Medial side of base of proximal phalanx of 5th finger

18
Q

Abductor Digiti Minimi

Innervation

A

Deep branch of ulnar nerve (C8, T1)

19
Q

Abductor Digiti Minimi

Actions

A

Abducts 5th finger; assists in flexion of its proximal phalanx

20
Q

Flexor Digiti Minimi Brevis

Origin

A

Hook of hamate and flexor retinaculum

21
Q

Flexor Digiti Minimi Brevis

Insertion

A

Medial side of base of proximal phalanx of 5th finger

22
Q

Flexor Digiti Minimi Brevis

Innervation

A

Deep branch of ulnar nerve (C8, T1)

23
Q

Flexor Digiti Minimi Brevis

Actions

A

Flexes proximal phalanx of 5th finger

24
Q

Opponens Digiti Minimi

Origin

A

Hook of hamate and flexor retinaculum

25
Q

Opponens Digiti Minimi

Insertion

A

Medial border of 5th metacarpal

26
Q

Lumbricals 1 and 2

Origin

A

Lateral two tendons of flexor digitorum profundus

unipennate

27
Q

Lumbricals 1 and 2

Insertion

A

Lateral sides of extensor expansions of 2nd-5th fingers

28
Q

Lumbricals 1 and 2

Innervation

A

Median nerve (C8, T1)

29
Q

Lumbricals 1 and 2

Actions

A

Flex metacarpophalangeal joints; extend interphalangeal joints of 2nd-5th fingers

30
Q

Lumbricals 3 and 4

Origin

A

Medial three tendons of flexor digitorum profundus

bipennate muscles

31
Q

Lumbricals 3 and 4

Insertion

A

Lateral sides of extenso expansions of 2nd-5th fingers

32
Q

Lumbricals 3 and 4

Innervation

A

Deep branch of ulnar nerve (C8, T1)

33
Q

Lumbricals 3 and 4

Actions

A

Flex metacarpophalangeal joints; extend interphalangeal joints of 2nd-5th fingers

34
Q

Dorsal Interossei, 1-4

Origin

A

Adjacent sides of two metacarpals

Bipennate muscles

35
Q

Dorsal Interossei, 1-4

Insertion

A

Bases of proximal phalanges; extensor expansions of 2nd-4th fingers

36
Q

Dorsal Interossei, 1-4

Actions

A

Abduct 2nd-4th fingers from axial line; act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

37
Q

Palamar interossei, 1-3

Origin

A

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

unipennate muscles

38
Q

Palmar Interossei, 1-3

Insertion

A

Bases of proximal phalanges; extensor expansions of 2nd, 4th, and 5th fingers

39
Q

Palmar Interossei, 1-3

Innervation

A

Deep branch of ulnar nerve (C8, T1)

40
Q

Palmar Interossei, 1-3

Actions

A

Adduct 2nd, 4th, and 5th fingers toward axial line; assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

Upper Limb (10 decks)

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