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Head and Neck > Extra-ocular Muscles > Flashcards

Extra-ocular Muscles Flashcards

1
Q

What are the extra-ocular muscles?

A 
Superior rectus
Inferior rectus
Medial rectus
Lateral rectus 
Superior oblique 
Inferior oblique
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2
Q

How is the primary resting gaze maintained?

A

Equal and opposite pull of all extra ocular muscles

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3
Q

What is the role of the superior rectus?

A

Elevate eye
Slightly internally rotates
Slightly adducts

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4
Q

What is the role of the inferior rectus?

A

Depress eye
Slightly externally rotates
Slightly adducts

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5
Q

What is the role of the medial rectus?

A

Move eye medially

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6
Q

What is the role of the lateral rectus?

A

Move eye laterally

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7
Q

What is the role of the superior oblique?

A

Internally rotate
Depress
Slightly abduct

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8
Q

What is the role of the inferior oblique?

A

Externally rotate
Elevate
Slightly abduct

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9
Q

What innervates superior rectus?

A

CN III

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10
Q

What innervates inferior rectus?

A

CN III

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11
Q

What innervates medial rectus?

A

CN III

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12
Q

What innervates lateral rectus?

A

CN VI

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13
Q

What innervates superior oblique?

A

CN IV

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14
Q

What innervates inferior oblique?

A

CN III

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15
Q

How do you test eye movements?

A

H shape

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16
Q

What controls elevation in the lateral position?

A

Superior rectus

17
Q

What controls depression in the lateral position?

A

Inferior rectus

18
Q

What controls elevation in the medial position?

A

Inferior oblique

19
Q

What controls depression in the medial position?

A

Superior oblique

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