Small Muscles of the Hand: OINA Flashcards by Hannah Padilla Lim

Q

Abductor pollicis brevis: Origin

A

Scaphoid, trapezium, flexor retinaculum

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Q

Abductor pollicis brevis: Insertion

A

Base of proximal phalanx of thumb

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Q

Abductor pollicis brevis: Innervation

A

Median nerve; C8, T1

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Q

Abductor pollicis brevis: Action

A

Abduction of thumb

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Q

Flexor pollicis brevis: Origin

A

flexor retinaculum

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Q

Flexor pollicis brevis: Insertion

A

Base of proximal phalanx of thumb

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Q

Flexor pollicis brevis: Innervation

A

Median nerve; C8, T1

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Q

Flexor pollicis brevis: Action

A

Flexes metacarpophalangeal joint of thumb

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Q

Opponens pollicis: Origin

A

flexor retinaculum

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Q

Opponens pollicis: Insertion

A

Shaft of metacarpal bone of thumb

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Q

Opponens pollicis: Innervation

A

Median nerve; C8, T1

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Q

Opponens pollicis: Action

A

Pulls thumb medially and forward across palm

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Q

Adductor pollicis: Origin

A

Oblique head, 2nd and 3rd metacarpal bones, transverse head, 3rd metacarpal bone

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Q

Adductor pollicis: Insertion

A

Base of proximal phalanx of thumb

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Q

Adductor pollicis: Innervation

A

Deep branch of ulnar nerve; C8, T1

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Q

Adductor pollicis: Action

A

Adduction of thumb

Q

Abductor digiti minimi: Origin

A

Pisiform bone

Q

Abductor digiti minimi: Insertion

A

Base of proximal phalanx of little finger

Q

Abductor digiti minimi: Innervation

A

Deep branch of ulnar nerve; C8, T1

Q

Abductor digiti minimi: Action

A

Abducts little finger

Q

Flexor digiti minimi: Origin

A

flexor retinaculum

Q

Flexor digiti minimi: Insertion

A

Base of proximal phalanx of little finger

Q

Flexor digiti minimi: Innervation

A

Deep branch of ulnar nerve; C8, T1

Q

Flexor digiti minimi: Action

A

Flexes little finger

Q

Opponens digiti minimi: Origin

A

flexor retinaculum

Q

Opponens digiti minimi: Insertion

A

Medial border of 5th metacarpal bone

Q

Opponens digiti minimi: Innervation

A

Deep branch of ulnar nerve; C8, T1

Q

Opponens digiti minimi: Action

A

Pulls 5th metacarpal forward as in cupping the palms