Eyeball and Eyelid Muscles Flashcards

1
Q

levator palpebrae superioris (origin)

A

lesser wing of sphenoid bone (anterior surface)

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2
Q

levator palpebrae superioris (insertion)

A

upper eyelid (skin and fascia)

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3
Q

levator palpebrae superioris (nerve)

A

oculomotor nerve (CN III)

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4
Q

levator palpebrae superioris (action)

A

elevates upper eyelid

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5
Q

superior rectus (origin)

A

tendinous ring on posterior wall of orbital cavity

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6
Q

superior rectus (insertion)

A

superior surface of eyeball just posterior to corneoscleral junction

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7
Q

superior rectus (nerve)

A

oculomotor nerve (CN III)

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8
Q

superior rectus (action)

A

raises cornea upwards and medially

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9
Q

inferior rectus (origin)

A

tendinous ring on posterior wall of orbital cavity

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10
Q

inferior rectus (insertion)

A

inferior surface of eyeball posterior to corneoscleral junction

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11
Q

inferior rectus (nerve)

A

oculomotor nerve (CN III)

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12
Q

inferior rectus (action)

A

depresses the cornea downwards and medially

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13
Q

medial rectus (origin)

A

tendinous ring on posterior wall of orbital cavity

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14
Q

medial rectus (insertion)

A

medial surface of eyeball just posterior to corneoscleral junction

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15
Q

medial rectus (nerve)

A

oculomotor nerve (CN III)

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16
Q

medial rectus (action)

A

rotates eyeball so that the cornea looks medially

17
Q

lateral rectus (origin)

A

tendinous ring on posterior wall of orbital cavity

18
Q

lateral rectus (insertion)

A

lateral surface of eyeball just posterior to corneoscleral junction

19
Q

lateral rectus (nerve)

A

abducens nerve (CN VI)

20
Q

lateral rectus (action)

A

rotates eyeball so that the cornea looks laterally

21
Q

superior oblique (origin)

A

posterior wall of orbital cavity

21
Q

superior oblique (insertion)

A

passes through a pulley and is attached to superior surface of eyeball beneath superior rectus

22
Q

superior oblique (nerve)

A

trochlear nerve (CN IV)

23
Q

superior oblique (action)

A

rotates eyeball so that the cornea looks downwards and laterally

24
Q

inferior oblique (origin)

A

floor of orbital cavity

25
Q

inferior oblique (insertion)

A

lateral surface of eyeball deep to lateral rectus

26
Q

inferior oblique (nerve)

A

oculomotor nerve (CN III)

27
Q

inferior oblique (action)

A

rotates eyeball so that the cornea looks upwards and laterally