Lab 2 Flashcards

1
Q

How is the orbit separated

A

Margin

Roof

Floor

Medial and lateral wall

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2
Q

What’s the supraorbital margin made of

A

Frontal bone

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3
Q

What’s the infraorbital margin made of

A

Zygomatic bone laterally

Maxilla medially

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4
Q

Whats the lateral margin made of

A

Frontal process of zygomatic

Zygomatic process of frontal

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5
Q

What’s the medial margin made of

A

Maximally process of frontal

Lacrimal crest of frontal

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6
Q

What’s the roof of the orbit made of

A

Frontal bone

Lesser wing of sphenoid

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7
Q

What’s the floor of the orbit made of

A

Orbital plate of maxilla

Zygomatic

Palatine

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8
Q

Whats the lateral wall made of

A

Zygomatic

Greater wing of sphenoid

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9
Q

What’s the medial wall made of

A

Frontal process maxilla

Lacrimal bone

Orbital plate of ethmoid

Body of sphenoid

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10
Q

Where is the optic canal and what is it for

A

Within the lesser wing of sphenoid

Used to transmit the optic nerve and ophthalmic artery

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11
Q

Where is the superior orbital fissure and what is it for

A

Between the lesser and greater wings of sphenoid

Transmit nerves

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12
Q

Where is the inferior orbital tissue and what is it for

A

Between Greater wing of sphenoid and maxilla

Transmits nerves

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13
Q

What is the anterior ethmoidal foramina and posterior ethmoidal foramina for

A

Ant transmits ant ethmoidal nerve and artery

Post transmits post ethmoidal nerve and artery

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14
Q

What sinus is located superiority What sinus located inferiorly

A

Superiorly there’s the frontal air sinus

Inferiorly there’s the maxillary air sinus

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15
Q

What’s sinus is located medially

A

Nasal cavity

Ethmoidal sinus

Sphenoid sinus

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16
Q

What is the paranasal sinus and what is it for

A

Cavities within bones of face that’s lined with mucoperiosteum and filled with air

Used to lighten the skull and resonates the voice

17
Q

Where is the thickest and thinnest bones in the orbit

A

Thickest lateral

Thinned floor

18
Q

Where is the commonest cause of orbital cellulitis

A

Medial wall as it’s thin and is a common route of infection from ethmoidal sinus