Thenar Muscles Of Hand Flashcards

1
Q

What are the thenar muscles? (3)

A

Opponens pollicis, abductor pollicis brevis, flexor pollicis brevis

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2
Q

Origin of opponens pollicis

A

Tubercle of trapezium + associated flexor retinaculum

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3
Q

Insertion of opponens pollicis

A

Lateral margin of 1st metacarpal

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4
Q

Action of opponens pollicis

A

Opposes the thumb

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5
Q

Innervation of opponens pollicis

A

Median nerve

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6
Q

Origin of abductor pollicis brevis

A

Tubercle of scaphoid and trapezium

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7
Q

Insertion of abductor pollicis brevis

A

Lateral side of proximal phalanx of thumb

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8
Q

Action of abductor pollicis brevis

A

Abducts the thumb

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9
Q

Innervation of abductor pollicis brevis

A

Median nerve

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10
Q

Origin of flexor pollicis brevis

A

Tubercle of trapezium

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11
Q

Insertion of flexor pollicis brevis

A

Base of proximal phalanx of thumb

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12
Q

Action of flexor pollicis brevis

A

Flexes MCPJ of thumb

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13
Q

Innervation of flexor pollicis brevis

A

Median nerve, deep head by ulnar nerve

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