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Anatomy > Skull and Orbital Anatomy > Flashcards

Skull and Orbital Anatomy Flashcards

1
Q

Try to remember these parts of the skull

A
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2
Q

Remember this diagram of orbital anatomy

A
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3
Q

Two bony cavities occupied by the eyes and associated muscles, nerves, blood vessels, etc.

A

Orbits

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4
Q

Where are the apex and base of the orbit situated?

A

Apex - Posteriorly

Base - Anteriorly

(Shaped by a 4 sided pyramid)

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5
Q

What structure is at the apex of the “bony pyramid” of the orbital

A

Optic Foramen

(think, how else do you get optical nerve through?)

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6
Q

Zygomatic process of frontal bone and greater wing of the sphenoid (orbital anatomy)

A

Lateral Wall

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7
Q

From anterior to posterior, this contains the

maxilla, lacrimal bone, lamina papyracea

A

Medial Wall

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8
Q

Orbital surfaces of the zygomatic bone and maxilla

A

Floor

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9
Q

Orbital plate of the frontal bone

A

Roof

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10
Q

Posterior part of the orbital roof

Carries the optic nerve and ophthalmic artery from the middle cranial fossa

A

Optic Canal

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11
Q

Structure between the greater and lesser wings of sphenoid bone

Carry CN III, IV, VI

Carries CN V1

A

Superior Orbital Fissure

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12
Q

Structure between greater sphenoid wing and the maxilla

Carries CN V2

A

Inferior Orbital Fissure

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13
Q

Gloss over these two diagrams of V1 V2 and V3 nerve distribution

A
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14
Q

Functions of the Lacrimal Gland

A

Produces secretions (tears) to lubricate eyes

Drains into the lacrimal duct (this is why your nose is runny when you cry)

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15
Q

Where does the Lacrimal duct lie?

A

In the Lacrimal Fossa (recess of the frontal bone)

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16
Q

What emerges from the internal carotid artery after the cavernous sinus

Is the only branch of the internal carotid artery

A

Opthalmic Arter

17
Q

Remember this diagram of the anatomy of the eye

A
18
Q

What part of the eye is responsible for focusing light?

A

Cornea and Lens

19
Q

What part of the eye controls how much light reaches the eye?

It also adjusts the size of the pupil

A

Iris

20
Q

What part of the eye further focuses light via accomodation?

A

Lens

21
Q

What part of the eye converts light to electronic signal?

A

Retina

22
Q

Quickly look at optical nerve pathway

A
23
Q

How many extraocular muscles are there?

What are they?

A

7 in total,

4 rectus muscles

1 Levator papebrae suprioris

1 inferior and 1 superior oblique muslces

24
Q

Which muscle of the eye is responsible for moving it TOWARDS the nose

A

Medial Rectus

25
Q

Which muscle of the eye is responsible for moving it AWAY from the nose?

A

Lateral Rectus

26
Q

Which muslces of the eye move it up and down

A

Superior rectus - up

Inferior rectus - down

27
Q

Which nerve is attached to the Superior Oblique muscle

Which to the Lateral Rectus?

A

CN IV to superior oblique (Trochlear)

CN VI to lateral rectus (Abducens nerve)

(Everything else is CN III, oculomotor)

28
Q

What are the three major orbit compartments divided by the muscle cone?

A

Intraconal

Conal

Extracona

29
Q

What does the Intraconal compartment hold?

A

Optic Nerves

Vessels

Fat

30
Q

What does the conal department hold?

A

Defined by extraocular muslces

31
Q

What does the Extraconal compartment hold?

A

Lacrimal Gland

Fat

Lymphoid tissue

32
Q

Which bone of the skull has complex inside to let CN VII, VIII and cochlear through?

A

Temporal Bone

33
Q

What is a hole in the ocipital bone where brain stem becomes the spinal cord?

A

Foramen Magnum

34
Q

What opening do the CN 7 and 8 go through in the temporal bone?

A

Internal Acoustic modulus

35
Q

Where does the CN V2 go through?

A

Inferior orbital fissure after accessing through foramen rotundum

36
Q

What does the foramen rotundum innervate with?

A

Mid parts of the face

37
Q

Try to remember these visual field deficits.

A
38
Q

What suture separates the parietal bone from the frontal?

A

Coronal Suture

Anatomy (15 decks)

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