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Gross Anatomy Muscle Attachments > Muscles of the Upper Extremity: Intrinsic Muscles of the Hand > Flashcards

Muscles of the Upper Extremity: Intrinsic Muscles of the Hand Flashcards

1
Q

Abductor Pollicis Brevis Proximal Attachment

A

Flexor retinaculum and tubercle of the scaphoid and trapezium

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2
Q

Abductor Pollicis Brevis Distal Attachment

A

Base of the proximal phalanx of thumb

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3
Q

Abductor Pollicis Brevis Innervation

A

Median n. [*C8,T1]

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4
Q

Abductor Pollicis Brevis Action

A

Abducts CMC & MCP joints of the thumb
Assists with:
-Thumb opposition

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5
Q

Flexor Pollicis Brevis Proximal Attachment

A

Superficial head: Flexor retinaculum and trapezium bone

Deep head: Trapezoid and capitate bones

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6
Q

Flexor Pollicis Brevis Distal Attachment

A

Base of the proximal phalanx of thumb

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7
Q

Flexor Pollicis Brevis Innervation

A

Median n. (superficial head) [*C8,T1]

Ulnar n. (deep head) [C8,*T1]

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8
Q

Flexor Pollicis Brevis Action

A

Flexes CMC & MCP joints of the thumb
Assists with:
-Thumb opposition

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9
Q

Oppenens Pollicis Proximal Attachment

A

Flexor retinaculum and trapezium bone

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10
Q

Opponens Pollicis Distal Attachment

A

Entire length of metacarpal I

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11
Q

Opponens Pollicis Innervation

A

Median n. [*C8,T1]

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12
Q

Opponens Pollicis Action

A

Opposes CMC joint of the thumb

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13
Q

Adductor Pollicis Proximal Attachment

A

Oblique head: Capitate bone and bases of metacarpals II & III
Transverse hea: Metacarpal III

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14
Q

Adductor Pollicis Distal Attachment

A

Base of the proximal phalanx of thumb

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15
Q

Adductor Pollicis Innervation

A

Ulnar n. [C8,*T1]

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16
Q

Adductor Pollicis Action

A

Adducts CMC & MCP joints of the thumb
Assists with:
-MCP joint flexion

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17
Q

Abductor Digiti Minimi Proximal Attachment

A

Pisiform and the tendon of FCI

18
Q

Abductor Digiti Minimi

A

Base of the proximal phalanx of the little finger

19
Q

Abductor Digiti Minimi Innervation

A

Ulnar n. [C8,*T1]

20
Q

Abductor Digiti Minimi Action

A

Abducts MCP joint of the little finger
Flexes MCP joint of the little finger
Assist with:
-Little finger opposition

21
Q

Flexor Digiti Minimi Proximal Attachment

A

Hook of the hamate and flexor retinaculum

22
Q

Flexor Digiti Minimi Distal Attachment

A

Base of the proximal phalanx of the little finger

23
Q

Flexor Digiti Minimi Innervation

A

Ulnar n. [C8,*T1]

24
Q

Flexor Digiti Minimi Action

A

Abducts MCP joint of the little finger
Flexes MCP joint of the little finger
Assist with:
-Little finger opposition

25
Q

Opponens Digiti Minimi Proximal Attachment

A

Hook of the hamate and flexor retinaculum

26
Q

Opponens Digiti Minimi Distal Attachment

A

Entire length of metacarpal V

27
Q

Opponens Digiti Minimi Innervation

A

Ulnar n. [C8,*T1]

28
Q

Opponens Digiti Minimi Action

A

Opposes CMC joint of the little finger

29
Q

Lumbricals Proximal Attachment

A

I and II: FDP tendons of digits II and III

III and IV: FDP tendons of digits III, IV, and V

30
Q

Lumbricals Distal Attachment

A

Lateral side of the extensor hood of the respective digit

31
Q

Lumbricals Innervation

A

I and II: Median n. [C8,*T1]

III and IV: Ulnar n. [C8,*T1]

32
Q

Lumbricals Action

A

Flex MCP joints of digits 2-5

Extend PIP & DIP joints of digits 2-5

33
Q

Dorsal Interossei Proximal Attachment

A

First: Adjacent sides of 1st and 2nd metacarpals
Second: Adjacent sides of 2nd & 3rd metacarpals
Third: Adjacent sides of 3rd and 4th metacarpals
Fourth: Adjacent sides of 4th and 5th metacarpals

34
Q

Dorsal Interossei Distal Attachment

A 
Into the extensor hoods of the proximal phalanges of their respective digits as follows:
First: Lateral side of digit II
SecondL Lateral side of digit III
Third: Medial side of digit III
Fourth: Medial side of digit IV
35
Q

Dorsal Interossei Innervation

A

Ulnar n. [C8,*T1]

36
Q

Dorsal Interossei Action

A

Abduct MCP joints of digits 2-4
Assists with:
-Flexion of MCP joints of digits 2-4
-Extension of PIP & DIP joints of digits 2-4

37
Q

Palmar Interossei Proximal Attachment

A

First: Medial side of metacarpal II
Second: Lateral side of metacarpal IV
Third: Lateral side of metacarpal V

38
Q

Palmar Interossei Distal Attachment

A

Into the extensor hoods of the proximal phalanges of their respective digits as follows:
First: Medial side of digit II
Second: Lateral side of digit IV
Third: Lateral side of digit V

39
Q

Palmar Interossei Innervation

A

Ulnar n. [C8,*T1]

40
Q

Palmar Interossei Action

A

Adduct MCP joints of digits 2, 4, & 5
Assists with:
-Flexion of MCP joints of digits 2, 4, & 5
-Extension of PIP & DIP joints of digits 2, 4, & 5

Gross Anatomy Muscle Attachments (21 decks)

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