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Gross Anatomy Exam 2 > Intrinsic Hand Muscles > Flashcards

Intrinsic Hand Muscles Flashcards

0
Q

Hypothenar Muscles

A

Abductor Digiti Minimi
Flexor Digiti Minimi Brevis
Opponens Digiti Minimi

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1
Q

Thenar Muscles

A

Opponens Pollicis
Abductor Pollicis Brevis
Flexor Pollicis Brevis
Adductor Pollicis

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2
Q

Short Muscles

A

Lumbricals
Dorsal Interossei
Palmar Interossei

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3
Q

Opponens Pollicis Origin

A

Flexor Retinaculum

Tubercles of Scaphoid and Trapezium

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4
Q

Opponens Pollicis Insertion

A

Lateral side of 1st Metacarpal

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5
Q

Innervation of Opponens Pollicis

A

Recurrent Branch of Median nerve C8 t1

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6
Q

Actions of Opponens Pollicis

A

Oppose Thumb, it draws 1st Metacarpal Medially to Center of Palm and Rotates it Medially

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7
Q

Origin of Abductor Pollicis Brevis

A

Flexor Retinaculum

Tubercles of Scaphoid and Trapezium

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8
Q

Insertion of Abductor Pollicis Brevis

A

Lateral side of Base of Proximal Phalanx of Thumb

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9
Q

Innervation of Abductor Pollicis Brevis

A

Recurrent branch of Median nerve C8 t1

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10
Q

Action of Abductor Pollicis Brevis

A

Abducts Thumb; helps oppose it

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11
Q

Origin of Flexor Pollicis Brevis

Superficial Head and Deep Head

A

Flexor Retinaculum

Tubercles of Scaphoid and Trapezium

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12
Q

Insertion of Flexor Pollicis Brevis

A

Lateral side of Base of Proximal Phalanx of Thumb

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13
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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14
Q

Actions of Flexor Pollicis Brevis

A

Flexes Thumb

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15
Q

Origin of Adductor Pollicis

A

Oblique Head: Bases of 2nd and 3rd Metacarpals, Capitate, Adjacent Carpals
Transverse Head: Anterior Surface of Shaft of 3rd Metacarpal

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16
Q

Insertion of Adductor Pollicis

A

Medial side of Base of Proximal Phalanx of Thumb

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17
Q

Innervation of Adductor Pollicis

A

Deep Branch of Ulnar Nerve c8 T1

18
Q

Actions of Adductor Pollicis

A

Adducts Thumb toward Lateral border of Palm

19
Q

Origin of Abductor Digiti Minimi

A

Pisiform

20
Q

Insertion of Abductor Digiti Minimi

A

Medial side of Proximal Phalanx of 5th finger

21
Q

Innervation of Abductor Digiti Minimi

A

Deep Branch of Ulnar Nerve c8 T1

22
Q

Actions of Abductor Digiti Minimi

A

Abducts 5th finger; assists in flexion of its Proximal Phalanx

23
Q

Origin of Flexor Digiti Minimi Brevis

A

Hook of Hamate

Flexor Retinculum

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 Nerve c8 T1

26
Q

Actions of Flexor Digiti Minimi Brevis

A

Flexes Proximal Phalanx of 5th Finger

27
Q

Origin of Opponens Digiti Minimi

A

Hook of Hamate

Flexor Retinaculum

28
Q

Insertion of Opponens Digiti Mimini

A

Medial border of 5th Metacarpal

29
Q

Innervation of Opponens Digiti Minimi

A

Deep Branch of Ulnar Nerve c8 T1

30
Q

Actions of Opponens Digiti Minimi

A

Draws 5th Metacarpal Anterior and Rotates it, bringing 5th Finger into Opposition with Thumb

31
Q

Origin of Lumbricals

A

1 and 2: Lateral two tendons of Flexor Digitorum Profundus (as Unipennate muscles)
3 and 4: Medial three tendons of Flexor Digitorum Profundus (as Bipennate Muscles)

32
Q

Insertion of Lumbricals

A

Lateral sides of Extensor Expansions of 2nd-5th fingers

33
Q

Innervation of Lumbricals

A

Median Nerve c8 T1

34
Q

Actions of Lumbricals

A

Flex Metacarpophalangeal joints; Extend Interphalangeal joints of 2nd-5th fingers

35
Q

Origin of Dorsal Interossei 1-4

A

Adjacent sides of Two Metacarpals (as Bipennate muscles)

36
Q

Insertion of Dorsal Interossei 1-4

A

Bases of Proximal Phalanges; Extensor Expansions of 2nd-4th fingers

37
Q

Innervations of Dorsal Interossei 1-4

A

Deep Branch of Ulnar Nerve c8 T1

38
Q

Actions of Dorsal Interossei 1-4

A

Abduct 2nd-4th fingers from Axial Line; act with Lumbricals in Flexing Metacarpophalangeal joints and Extending Interphalangeal Joints

39
Q

Origin of Palmar Interossei 1-3

A

Palmar surfaces of 2nd 4th 5th Metacarpals (as Unipennate muscles)

40
Q

Insertion of Palmar Interossei 1-3

A

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

41
Q

Innervation of Palmar Interossei 1-3

A

Deep Branch of Ulnar Nerve c8 T1

42
Q

Action of Palmar Interossei

A

Adduct 2nd 4th 5th fingers toward Axial Line; Assist Lumbricals in Flexing Metacarpophalangeal joints and Extending Interphalangeal joints

Gross Anatomy Exam 2 (15 decks)

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