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General Anatomy (2nd year) > hand muscles > Flashcards

hand muscles Flashcards

1
Q

Abductor Digiti Minimi Origin

A

Pisiform, tendon of flexor carpi ulnaris, pisohamate ligament, ulnar border of flexor retinaculum

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2
Q

Abductor Digiti Minimi Insertion

A

ulnar/medial side of base of proximal phalanx of little finger, dorsal expansion, contributes to the bulk of the hypothenar eminence on the ulnar side of 5th MC

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3
Q

Abductor Digiti Minimi Action

A

abducts the MCP joint of little finger, assists in opposition, may assist in flexion of MCP joint of little finger

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4
Q

Abductor Digiti Minimi Nerve

A

Ulnar Nerve C7-8 T1

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5
Q

Flexor Digiti Minimi Brevis Origin

A

hook of hamate, ulnar border of flexor retinaculum

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6
Q

Flexor Digiti Minimi Brevis Insertion

A

base of proximal phalanx of little finger on palmar side

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7
Q

Flexor Digiti Minimi Brevis Action

A

flexes MCP joint of 5th digit, assists in opposition

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8
Q

Flexor Digiti Minimi Brevis Nerves

A

Ulnar Nerve C7-8 T1

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9
Q

Opponens Digiti Minimi Origin

A

hook of hamate, flexor retinaculum (ulnar border)

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10
Q

Opponens Digiti Minimi Insertion

A

palmar medial margin of fifth metacarpal

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11
Q

Opponens Digiti Minimi Action

A

brings digit into opposition with thumb, draws 5th MC anterior & rotates it laterally, deepens hollow of palm, cups the palm

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12
Q

Opponens Digiti Minimi Nerve

A

Ulnar Nerve C7-8 T1

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13
Q

Lumbricals Origin

A

1-radial & palmar aspect of FDP tendon to the 2nd finger, 2- radial & palmar aspect of FDP tendon to the 3rd finger, 3- ulnar & palmar aspect of FDP tendon to 3rd & radial & palmar aspect of the 4th finger, 4- ulnar & pallmar aspect of FDP tendon to 4th & radial & palmar aspect of the 5th finger

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14
Q

Lumbricals Insertion

A

base of the proximal phalanx on the palmar aspect of digits 2-5 (flexion of MCP joint), tendons of extensor digitorum communis (for extension of IP joint)

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15
Q

Lumbricals Action

A

flexion of MCP joint of digits 2-5, extension of proximal IP & DIP joint of digits 2-5, extend IP joints when MCP joint are extended

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16
Q

Lumbricals Nerve

A

1st&2nd- Median Nerve C6-8 T1. 3rd & 4th - Ulnar Nerve C7-8 T1

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17
Q

Dorsal Interossei Origin

A

adjacent sides of two metacarpal bones, 1-adjacent sides of the 1st & 2nd MC, 2- adjacent sides of the 2nd&3rd MC, 3- adjacent sides of the 3rd&4th MC, 4- adjacent sides of the 4th&5th MC

18
Q

Dorsal Interossei Insertion

A

base of proximal phalanx, 1- radial side of the proximal phalanx of 2nd, 2- radial side of the proximal phalanx of 3rd, 3-ulnar side of the proximal phalanx of 3rd, 4- ulnar side of the proximal phalanx of the 4th,

19
Q

Dorsal Interossei Action

A

abduction of 2,3 & 4 MCP joints (away from midline), assists with flexion of MCP joints & extension of IP joints of 2-4 fingers, first interossei assists with adduction of thumb

20
Q

Dorsal Interossei Nerve

A

Ulnar Nerve C8 T1

21
Q

Palmar Interossei Origin

A

1-from base of ulnar & palmar side of 2nd MC,
2-from the radial side of the 4th MC,
3- from the radial side of the 5th MC

22
Q

Palmar Interossei Insertion

A

dorsal digital expansion,
1- base of proximal phalanx ulnar aspect of 2nd,
2- base of proximal phalanx radial aspect 4th,
3rd - base of proximal phalanx radial aspect of 5th

23
Q

Palmar Interossei Action

A

1- adducts 2nd finger,
2- adducts 4th finger,
3- adducts 5th finger, assists in flexion of MCP joints & extension of IP joints of these giners (work with lumbricals)

24
Q

Palmar Interossei Nerve

A

Ulnar Nerve C8 T1

25
Q

Abductor Pollicis Brevis Origin

A

tubercle of scaphoid, tubercle of trapezium

26
Q

Abductor Pollicis Brevis Insertion

A

radial aspect of base of proximal phalanx of the thumb

27
Q

Abductor Pollicis Brevis Action

A

abduction of thumb (draws thumb forward) at MCP & CMC joint, assists in opposition, may assist in flexion & medial rotation of MP joint

28
Q

Abductor Pollicis Brevis Nerve

A

Meidan Nerve C6-8 T1

29
Q

Flexor Pollicis Brevis Superficial Origin

A

flexor retinaculum, tubercle of trapezium

30
Q

Flexor Pollicis Brevis Deep Origin

A

trapezoid & capitate

31
Q

Flexor Pollicis Brevis Insertion

A

base of proximal phalanx (palmar aspect)

32
Q

Flexor Pollicis Brevis Action

A

flexion of MCP, flexion of CMC joint of thumb, assists in opposition toward little finger, acts synergistically w/ opponens pollicis/abductors pollicis in flexing & medially rotating thumb

33
Q

Flexor Pollicis Brevis Superficial head Nerve

A

Median Nerve C6-8 T1

34
Q

Opponens Pollicis Origin

A

tubercle of trapezium, flexor retinaculum

35
Q

Opponens Pollicis Insertion

A

Palmar radial surface of radial border of 1st metacarpal

36
Q

Opponens Pollicis Action

A

primary responsibility is medial rotation of the metacarpal, opposition of thumb

37
Q

Opponens Pollicis Nerve

A

Median Nerve C6-8 T1

38
Q

Adductor Pollicis Oblique Head Origin

A

trapezoid & capitate, base of 2nd & 3rd MC

39
Q

Adductor Pollicis Transverse Head Origin

A

Palmar surface of third metacarpal, 2 heads separated by radial artery

40
Q

Adductor Pollicis Insertion

A

ulnar side of base of proximal phalanx of thumb (medial aspect), oblique fibres run into extensor expansion, palpated along palmar aspect of the web space btwn 1st&2nd MC

41
Q

Adductor Pollicis Action

A

adducts thumb (gripping objects), aids in opposition (when holding an object), assists in extension of IP joint, gives power to grip

42
Q

Adductor Pollicis Nerve

A

Ulnar Nerve C8 T1

General Anatomy (2nd year) (8 decks)

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