Hand Intrinsic Muscles Flashcards

1
Q

Dorsal Interossei
(Origin)

A

Origin: Adjacent Sides of Two Metacarpal Bones

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2
Q

Dorsal Interossei
(Insertion)

A

Insertion: Base of Proximal Phalanges, Extensor Expansion of Digits 2-4

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3
Q

Dorsal Interossei
(Action)

A

Action: Abduct Digits from Axial Line of hand (3rd digit): Flex digits at metacarpophalangeal joint and extend interphalangeal joints

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4
Q

Dorsal Interossei
(Innervation)

A

Innervation: Ulnar Nerve (Deep Branch)

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5
Q

Dorsal Interossei
(Blood Supply)

A

Blood Supply: Deep Palmar Arch

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6
Q

Palmar Interossei
(Origin)

A

Origin: Sides of Metacarpals 2,4,and 5

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7
Q

Palmer Interossei
(Insertion)

A

Insertion: Bases of proximal phalanx and
extensor expansion of digits 2, 4,
and 5

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8
Q

Palmer Interossei
(Action)

A

Adducts digits toward axial line of
hand (3rd digit); flexes digits at
metacarpophalngeal joint and
extends interphalangeal joints

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9
Q

Palmer Interossei
(Innervation)

A

Innervation: Ulnar Nerve (Deep Branch)

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10
Q

Palmer Interossei
(Blood Supply)

A

Blood Supply: Deep Palmar Arch

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11
Q

Lumbricals
(Origin)

A

Origin: 1st and 2nd: Lateral two
tendons of flexor
digitorum profundus. 3rd
and 4th: Medial three
tendons of flexor
digitorum profundus

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12
Q

Lumbricals
(Insertion)

A

Insertion: 1st and 2nd: Lateral sides of
extensor expansion of digits 2
and 3. 3rd and 4th: Lateral sides
of extensor expansion of digits 4
and 5

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13
Q

Lumbricals
(Action)

A

Action: Extend digits at interphalangeal
joints, flex metacarpophalangeal
joints

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14
Q

Lumbricals
(Innervation)

A

Innervation: Ulnar Nerve (Deep Branch)

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15
Q

Lumbricals
(Blood Supply)

A

Blood Supply: Superficial and Deep Palmer Arches

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