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The Skull > Orbit > Flashcards

Orbit Flashcards

1
Q

What are the extra ocular mm?

A

Laevator palpebrae superior
rectus MM
oblique MM

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2
Q

What are all the rectus MM?

A

Superior
inferior
medial
lateral

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3
Q

What are all the oblique mm?

A

Superior

inferior

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4
Q

What muscle does the occulomotor nerve superior division nerve innervate?

A 
Laevator palpebrae superior 
rectus MM (superior)
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5
Q

What muscle does the occulomotor nerve inferior division nerve innervate?

A 
rectus MM (inferior, medial)
oblique MM (inferior)
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6
Q

What muscle does abducen nerve innervate?

A

Rectus (lateral)

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7
Q

What muscle does the trochlear nerve innervate?

A

Oblique (superior)

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8
Q

What are the seven bones of the orbit?

A 
Ethmoid
Lacrimal
Palatine
Maxilla
Zygomatic
Sphenoid
Frontal
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9
Q

What are the movements of the eye?

A 
Abduction
Adduction
Extorsion 
Intorsion
Elevation 
Depression
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10
Q

What is the action of Levator palpebral superior?

A

Elevation upper eyelid (opens the upper lid)

[Lower lid closes by gravity]

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11
Q

What is the action of rectus superior?

A

Elevation

Adduction & intorsion

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12
Q

What is the action of rectus inferior?

A

Depression

Adduction & extorsion

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13
Q

What is the action of rectus medial?

A

adduction

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14
Q

What is the action of rectus lateral?

A

abduction

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15
Q

What is the action of oblique superior?

A

Depression & abduction

Intorsion

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16
Q

What is the action of oblique inferior?

A

Elevation & abduction

Extorsion

17
Q

What is the artery of the orbit?

A

ICA

18
Q

What are the branches of the ICA that serve the orbit?

A

ophthalmic

follows path of nasocillary nerve

19
Q

What is the special afferent nerve of the orbit?

A

orbital - vision

20
Q

What is the general afferent nerve of the orbit?

A

ophthalmic nerve

21
Q

What are the branches of the ophthalmic Artery?

A 
Lacrimal
Central retinal
Posterior ciliary – long + short
Supraorbital
Supratrochlear
Ethmoidal – anterior and posterior
Dorsal nasal (travels with infratrochlear
22
Q

What are the general efferents of nerve of the orbit?

A

occulomotor- most mm
trochlear - sup. oblique
abducen- rectus lateral

The Skull (4 decks)

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