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Anatomy - Head and Neck > The orbit and eye > Flashcards

The orbit and eye Flashcards

1
Q

What are the three foramina at the apex of the orbit?

A

Optic foramen
Superior orbital fissure
Inferior orbital fissure

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2
Q

What passes through the optic foramen?

A

Optic nerve

Ophthalmic artery

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3
Q

What passes through the superior orbital fissure?

A

Cranial nerve 3, 4 and 6
Ophthalmic division of trigeminal nerve
Ophthalmic veins

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4
Q

What passes through the inferior orbital fissure?

A

Maxillary division of trigeminal nerve

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5
Q

What are the main contents of the orbit?

A 
Eye
Extrinsic ocular muscles 
Ligaments supporting the eye
Optic nerve
Branches of ophthalmic artery
Lacrimal apparatus (Tears)
Adipose fat
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6
Q

What are the components of the fibrous coat of the eye?

A

Sclera

Cornea

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7
Q

What are the components of the vascular coat of the eye?

A

Choroid
Iris
Ciliary Body

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8
Q

What are the components of the inner sensory layer of the eye?

A

Retina

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9
Q

What is the name given to the watery fluid in the anterior segment of the eye?

A

Aqueous Humour

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10
Q

What is the name given to the gel in the posterior segment?

A

Vitreous Humour

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11
Q

What part of the eye produces aqueous humour?

A

Ciliary body

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12
Q

What are the names of the intrinsic muscles of the eye?

A

Ciliaris
Constrictor Pupillae
Dilator Pupillae

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13
Q

Where is the ciliaris located?

A

Ciliary body

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14
Q

What is the innervation of both constrictor papillae and ciliaris?

A

Parasympathetic via Cranial Nerve III

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15
Q

How many muscles are there which move the eye?

A

6

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16
Q

Of the extrinsic muscles of the eye, how many are recti and how many are obliques?

A

4 recti

2 obliques

17
Q

What is the only muscle that does not arise from the posterior aspect of the orbit?

A

Inferior Oblique

18
Q

Name the ligaments that prevent over adduction and over abduction of the eye

A

Medial and lateral check ligaments

19
Q

What is the function of the suspensory ligament of the eye?

A

Supports the eye and prevents downwards displacement

20
Q

Name the branch of the internal carotid artery that supplies the orbit and the eye

A

Ophthalmic Artery

21
Q

Which foramina in the orbit do the ophthalmic veins pass through to enter into the cavernous venous sinus in the cranial cavity?

A

Superior Orbital Fissure

22
Q

What is the action of the medial rectus?

A

Adduction

23
Q

What are the actions of the superior rectus?

A

Elevation
Adduction
Intorsion

24
Q

What are the actions of the superior oblique?

A

Depression
Abduction
Intorsion

Anatomy - Head and Neck (20 decks)

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