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Anatomy > Osteology of orbit > Flashcards

Osteology of orbit Flashcards

1
Q

What nerves are found in the orbit?

A 
II
III
IV
V1
V2
VI
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2
Q

What ganglion is found in the orbit?

A

Cilary ganglion

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3
Q

What does the superior orbital fissure transmit?

A

III, IV, V1, VI.
Orbital branch of middle meningeal.
Superior ophthalmic vein

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4
Q

What branches of V1 transmitted by superior orbital fissure?

A

Lacrimal, frontal and nasocilary nerve

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5
Q

What does the optic canal transmit?

A

Optic nerve, ophthalmic artery, central retinal vein

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6
Q

What bone forms the superior border of the orbit?

A

Orbital plate of frontal bone

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7
Q

What bones forms the inferior border of the orbit?

A

Orbital plate of maxilla

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8
Q

What forms the lateral wall fo the orbit?

A

Zygomatic process of frontal bone and zygomatic bone

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9
Q

What are the extraocular muscles?

A

Superior rectus, inferior rectus, lateral rectus, medial rectus, inferior oblique, superior oblique, levator palperai superioris

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10
Q

All extra ocular muscles are attached to this except for inferior oblique?

A

Tendinous ring

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11
Q

Where does inferior oblique originate?

A

Floor of orbit

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12
Q

What are the innervations of the extra ocular muscles?

A

Lateral rectus = abducens
Superior oblique = trochlear
All the others = occulomotor

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13
Q

What is the function of medial rectus?

A

Adduction

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14
Q

What is the function of lateral rectus?

A

Abduction

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15
Q

What is the primary action of superior rectus?

A

Elevation and adduction

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16
Q

What is the secondary action of superior rectus?

A

Inward rotation

17
Q

What is the primary action of inferior oblique?

A

Elevation and abduction

18
Q

What is the secondary action of inferior oblique?

A

Outward rotation

19
Q

What is the primary action of inferior rectus?

A

Depression and adduction

20
Q

What is the secondary action of inferior rectus?

A

Outward rotation

21
Q

What is the primary action of superior oblique?

A

Depression and abduction

22
Q

What is the secondary action of superior oblique?

A

Inward rotation

23
Q

What does adduct mean?

A

Towards midline

24
Q

What does abduct mean?

A

Away from midline

25
Q

Why do extra ocular muscles have more than 1 effect?

A

They aren’t on horizontal sagittal plane

26
Q

What muscles are used to elevate the eye?

A

Superior rectus and inferior oblique

Anatomy (40 decks)

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