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Gross Anatomy Exam 2 > Intrinsic Muscles of the Hand > Flashcards

Intrinsic Muscles of the Hand Flashcards

0
Q

pneumonic for the interossei for the hand

A 
start from lateral side of index finger:
Dogs 
Poop 
Dogs 
Don't 
Poop
Dogs 
Poop

DAB –> Dorsal ABducts
PAD–> Palmar ADducts

D stands for Dorsal Interossei Muscles
P stands for Palmar Interossei Muscles

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1
Q

What are the Thenar Muscles?

A

1) Oppnens Pollicis
2) Abductor Pollicis Brevis
3) Flexor Pollicis Brevis : Superficial Head and Deep Head
4) Adductor Pollicis: Oblique Head and Transverse Head

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2
Q

Origin of Opponens Pollicis

A

1) Flexor Retinaculum

2) Tubercles of Scaphoid and Trapezium

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3
Q

Insertion for Oppenens Pollicis

A

Lateral Side of 1st Metacarpal

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4
Q

Innervation of Opponens Pollicis

A

Recurrent Branch of Medial Nerve (C8, T1)

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5
Q

Action of Opponens Pollicis

A

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

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6
Q

Origin of Abductor Pollicis Brevis

A

1) Flexor Retinaculum

2) Tubercles of the Scaphoid and Trapezium

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7
Q

Insertion of Abductor Pollicis Brevis

A

Lateral Side of Base of Proximal Phalanx of Thumb

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8
Q

Innervation of Abductor Pollicis Brevis

A

Recurrent Branch of Median Nerve (C8, T1)

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9
Q

Action of Abductor Pollicis Brevis

A

Abducts the thumb; and helps oppose it

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10
Q

Origin of Flexor Pollicis Brevis (Superficial Head and Deep Head)

A

1) Flexor Retinaculum

2) Tubercles of Scaphoid and Trapezium

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11
Q

Insertion of Flexor Pollicis Brevis

A

Lateral Side of Base of Proximal Phalanx of Thumb

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12
Q

Innervation of Flexor Pollicis Brevis

A

Superficial Head: Recurrent Branch of Median Nerve (C8,T1)

Deep Head: Deep Branch of Ulnar Nerve (C8,T1)

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13
Q

Action of Flexor Pollicis Brevis

A

Flexes the Thumb

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14
Q

Origin of Adductor Pollicis (Oblique Head and Transverse Head)

A

1) Oblique Head: a) Bases of 2nd and 3rd Metacarpals
b) Capitate
c) Adjacent Metacarpals

2) Transverse Head: Anterior Surface of Shaft of Third Metacarpal

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15
Q

Insertion of Adductor Pollicis

A

Medial Side of Base of Proximal Phalanx of Thumb

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16
Q

Innervation of Adductor Pollicis

A

Deep Branch of Ulnar Nerve (C8,T1)

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17
Q

Action of Adductor Pollicis

A

Adducts thumb towards lateral border of palm

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18
Q

What are the Hypothenar Muscles?

A

1) Abductor Digiti Minimi
2) Flexor Digiti Minimi Brevis
3) Opponens Digiti Minimi

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19
Q

Origin of Abductor Digiti Minimi

A

Pisiform

20
Q

Insertion of Abductor Digiti Minimi

A

Medial Side of Base of Proximal Phalanx of 5th Finger

21
Q

Innervation of Abductor Digiti Minimi

A

Deep Branch of Ulnar Nerve (C8,T1)

22
Q

Action of Abductor Digit Minimi

A

Abducts the 5th finger; assists of its proximal phalanx

23
Q

Origin of Flexor Digiti Minimi Brevis

A

1) Hook of Hamate

2) Flexor Retinaculum

24
Q

Insertion of Flexor Digiti Minimi Brevis

A

Medial Side of Base of Proximal Phalanx of 5th Finger

25
Q

Innervation of Flexor Digiti Minimi Brevis

A

Deep Branch of Ulnar Neve (C8, T1)

26
Q

Action of Flexor Digiti Minimi Brevis

A

Flexes the Proximal Phalanx of 5th Finger

27
Q

Origin of Opponens Digiti Minimi

A

1) Hook of Hamate

2) Flexor Retinaculum

28
Q

Insertion of Opponens Digiti Minimi

A

Medial Border of 5th Metacarpal

29
Q

Innervation of Opponens Digiti Minimi

A

Deep Branch of Ulnar Nerve (C8,T1)

30
Q

Action of Opponens Digiti Minimi

A

Draws 5th Metacarpal anterior and rotates it, bringing 5th finger into opposition with the thumb

31
Q

What are the short muscles of the hand?

A 
Lumbricals (1&2, 3&4)
Dorsal Interossei (1-4)
Palmar Interossei (1-3)
32
Q

Origin of Lumbricals 1&2

A

Lateral two tendons of Flexor Digitorum Profundus (as unipennate muscles)

33
Q

Insertion of Lumbricals 1&2

A

Lateral Side of Extensor Expansions 2nd-5th fingers

34
Q

Innervation of Lumbricals 1&2

A

Median Nerve (C8, T1)

35
Q

Action of Lumbricals 1&2

A

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

36
Q

Origin of Lumbricals 3&4

A

Medial Three Tendons of Flexor Digitorum Profundus (as bipennate muscles)

37
Q

Insertion of Lumbricals 3&4

A

Lateral Sides of Extensor Expansions of 2nd-5th Fingers

38
Q

Innervation of Lumbrcials 3&4

A

Median Nerve (C8 and T1)

39
Q

Action of Lumbricals 3&4

A

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

40
Q

Origin of Dorsal Interossei 1-4

A

Adjacent sides of two metacarpals (as bi-pennate muscles)

41
Q

Insertion of Dorsal Interossei 1-4

A

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

42
Q

Innervation of Dorsal Interossei 1-4

A

Deep Branch of Ulnar Nerve (C8-T1)

43
Q

Action of Dorsal Interossei 1-4

A

Abduct 2nd-4th Fingers from Axial Line; act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

44
Q

Origin of Palmar Interossei 1-3

A

Palmar Surface of 2nd, 4th, and 5th metacarpals (as unipennate muscles)

45
Q

Insertion of Palmar Interossei 1-3

A

Bases of Proximal Phalanges; Extensor Expansions of 2nd, 4th and 5th fingers

46
Q

Innervation of Palmar Interossei 1-3

A

Deep Branch of Ulnar Nerve (C8,T1)

47
Q

Action of Palmar Interossei 1-3

A

Adduct 2nd, 4th, and 5th Fingers towards axial lines; assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

Gross Anatomy Exam 2 (15 decks)

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