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Gross Anatomy > Hand Muscles > Flashcards

Hand Muscles Flashcards

0
Q

Abductor Pollicis Brevis: Insertion

A

Lateral Base, Proximal Phalanx of Thumb

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1
Q

Abductor Pollicis Brevis: Origin

A

Flexor Retinaculum

Tubercles of Scaphoid & Trapezium

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2
Q

Abductor Pollicis Brevis: Innervation

A

Recurrent Branch of Median Nerve

C8, T1

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3
Q

Abductor Pollicis Brevis: Action

A

Abducts Thumb

Helps Oppose it

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4
Q

Flexor Pollicis Brevis: Origin

A

Flexor retinaculum

Tubercles of scaphoid & trapzium

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5
Q

Flexor Pollicis Brevis: Insertion

A

Lateral side, Base of Proximal Phalanx of Thumb

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6
Q

Flexor Pollicis Brevis: Innervation

A

Recurrent branch of Median Nerve

C8, T1

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7
Q

Flexor Pollicis Brevis: Action

A

Flexes Thumb

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8
Q

Opponens Pollicis: Origin

A

Flexor Retinaculum

Tubercles of scaphoid & trapezium

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9
Q

Opponents Pollicis: Insertion

A

Lateral side of 1st metacarpal

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10
Q

Opponents Pollicis: Innervation

A

Recurrent Branch of Median Nerve

C8, T1

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11
Q

Opponens Pollicis: Action

A

Oppose Thumb

- draws 1st metacarpal medially to center of palm and rotates medially

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12
Q

Adductor Pollicis: Oblique Head Origin

A

Bases of 2nd & 3rd metacarpals
Capitate
Adjacent carpals

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13
Q

Adductor Pollicis: Transverse Head

A

Anterior surface of shaft of 3rd metacarpal

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14
Q

Adductor Pollicis: Insertion

A

Medial side of base of proximal phalanx of thumb

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15
Q

Adductor Pollicis: Innervation

A

Deep Branch Ulnar Nerve

C8, T1

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16
Q

Adductor Pollicis: Action

A

Adducts thumb toward lateral border of palm

17
Q

Abductor Digiti Minimi: Origin

A

Pisiform

18
Q

Abductor Digiti Minimi: Insertion

A

Proximal Phalanx of 5th finger; medial side of base

19
Q

Abductor Digiti Minimi: Innervation

A

Deep Branch of Ulnar Nerve

C8, T1

20
Q

Abductor Digiti Minimi: Action

A

Abducts 5th finger

Assists in flexion of proximal parts

21
Q

Flexor Digiti Minimi Brevis: Origin

A

Hook of Hamate

Flexor Retinaculum

22
Q

Flexor Digiti Minimi Brevis: Insertion

A

Proximal Phalanx of 5th finger; medial side of base

23
Q

Flexor Digiti Minimi Brevis: Innervation

A

Deep Branch of Ulnar Nerve

C8, T1

24
Q

Flexor Digiti Minimi Brevis: Action

A

Flexes proximal phalanx of 5th finger

25
Q

Opponens Digiti Minimi: Origin

A

Hook of Hamate

Flexor Retinaculum

26
Q

Opponens Digiti Minimi: Insertion

A

Medial Border of 5th metacarpal

27
Q

Opponens Digiti Minimi: Innervation

A

Deep branch of Ulnar Nerve

C8, T1

28
Q

Opponens Digiti Minimi: Action

A

Draws 5th metacarpal anterior and rotates it

- bringing 5th finger into opposition with thumb

29
Q

Lumbricals: Origin

A

1&2: Lateral two tendons of FDP
3&4: Medial three tendons of FDP

(Flexor digitorum profundus)

30
Q

Lumbricals: Insertion

A

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

31
Q

Lumbricals: Innervation

A

Medial Nerve

C8, T1

32
Q

Lumbricals: Action

A

Flex metacarpophalangeal joints (MP)

Extend intercarpalphalangeal joints 2-5 (IP)

33
Q

Dorsal Interosseous 1-4: Origin

A

Adjacent sides of two metacarpals

Bipennate

34
Q

Dorsal Interosseous: Insertion

A

Bases of proximal phalanges

Extensor expansions of 2-4 fingers

35
Q

Dorsal Interosseous: Innervation

A

Deep branch of Ulnar Nerve

C8, T1

36
Q

Dorsal Interosseous 1-4: Action

A

Abduct 2-4 fingers from axial line

Flex MP joints & extend IP joints with lumbricals

37
Q

Palmar Interosseous 1-3: Origin

A

Palmar surface of 2, 4, and 5 metacarpals

Unipennate

38
Q

Palmar Interosseous 1-3: Insertion

A

Bases of proximal phalanges

Extensor expansions of 2, 4, 5 fingers

39
Q

Palmar Interosseous1-3: Innervation

A

Deep branch of Ulnar Nerve

C8, T1

40
Q

Palmar Interosseous 1-3: Action

A

Adduct 2, 4, 5 fingers towards axial line

Flex MP joints & extend IP joints with lumbricals

Gross Anatomy (9 decks)

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