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Anatomy Of The Head And Neck > Muscles Of Orbit > Flashcards

Muscles Of Orbit Flashcards

0
Q

Insertion of levator palpebrae superioris

A

Superior tarsus and skin of superior eyelid

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1
Q

Origin of levator palpebrae superioris

A

Lesser wing of sphenoid bone, superior and anterior to optic canal

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2
Q

Innervation of levator palpebrae superioris

A 
Oculomotor nerve 
Deep layer (superior tarsal muscle) supplied by sympathetic fibers
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3
Q

Actions of the levator palpebrae superioris

A

Elevates superior eyelid

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4
Q

Origin of the superior oblique (SO)

A

Body of sphenoid bone

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5
Q

Insertion of superior oblique (SO)

A

Tendon passes through trochlea to insert into sclera, deep to SR

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6
Q

Innervation of the superior oblique (SO)

A

Trochlear nerve (CN IV)

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7
Q

Action of the superior oblique (SO)

A

Abducts, depresses, and rotates eyeball medially (intorsion)

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8
Q

Origin of the inferior oblique (IO)

A

Anterior part of floor of orbit

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9
Q

Insertion of the inferior oblique (IO)

A

Sclera deep to lateral rectus muscle

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10
Q

Innervation of inferior oblique (IO)

A

Oculomotor nerve (CN III)

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11
Q

Action of the inferior oblique (IO)

A

Abducts, elevates, and rotates eyeball laterally (extorsion)

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12
Q

Origin of the superior rectus (SR)

A

Common tendinous ring

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13
Q

Insertion of the superior rectus (SR)

A

Sclera just posterior to corneoscleral junction

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14
Q

Innervation of the superior rectus (SR)

A

Oculomotor nerve (CN III)

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15
Q

Action of the superior rectus (SR)

A

Elevates, adducts, and rotates eyeball medially (intorsion)

16
Q

Origin of the inferior rectus (IR)

A

Common tendinous ring

17
Q

Insertion of inferior rectus (IR)

A

Sclera just posterior to corneoscleral junction

18
Q

Innervation of the inferior rectus (IR)

A

Oculomotor nerve (CN III)

19
Q

Actions of the inferior rectus (IR)

A

Depresses, adducts, and rotates eyeball laterally (extorsion)

20
Q

Origin of the medial rectus (MR)

A

Common tendinous ring

21
Q

Insertion of the medial rectus (MR)

A

Sclera just posterior to corneoscleral junction

22
Q

Innervation of the medial rectus (MR)

A

Oculomotor nerve (CN III)

23
Q

Action of the medial rectus (MR)

A

Adducts eyeball

24
Q

Origin of the lateral rectus (LR)

A

Common tendinous ring

25
Q

Insertion of the lateral rectus (LR)

A

Sclera just posterior to corneoscleral junction

26
Q

Innervation of the lateral rectus (LR)

A

Abducent nerve (CN VI)

27
Q

Actions of the lateral rectus (LR)

A

Abducts eyeball

Anatomy Of The Head And Neck (8 decks)

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