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Head&Neck > Eye&Orbit--Exam III > Flashcards

Eye&Orbit--Exam III Flashcards

1
Q

What is the muscle that closes the eye? What is it innervated by?

A

Orbicularis Oculi-VII.. Remember the “hook” thing?!

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2
Q

What is the muscle that opens the eye? What is it innervated by? What is the small muscle inside this muscle that is sympathetically innervated?

A

Levator Palpebrae Superioris-III. Remember III keeps the eye open?! The SUPERIOR TARSAL muscle is smooth muscle with in the LevPalpebrae that sympathetically keeps the eyes open

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3
Q

What are the function of the Tarsal Glands?

A

To produce a fatty secretion that will keep the eyelids from sticking together

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4
Q

What is the mucous membrane of the eyelid and eyeball?

A

The conjunctiva

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5
Q

What type of conjunctiva is continuous with the skin and is very vascular?

A

Palpebal Conjunctiva

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6
Q

What type of conjunctiva is transparent and is continuous with the cornea?

A

Bulbar Conjunctiva

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7
Q

Describe the sensory innervation to the upper eyelid

A

V1–>Lacrimal, Frontal–>SupraOrbital, SupraTrochlear

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8
Q

Describe the sensory innervation to the lower eyelid

A

V2–>Inferior Palpebral

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9
Q

Describe the blood supply to the upper eyelid

A

Internal Carotid–>Opthalmic–>SupraOrbital, SupraTrochlear

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10
Q

Describe the blood supply to the lower eyelid

A

Maxillary–>InfraOrbital–>Inferior Palpebral

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11
Q

Describe the Lacrimal Drainage System…

A

Tears from Lacrimal Gland–>Superior and Inferior Puncta–>Lacrimal Canal–>Lacrimal Sac–>NasoLacrimal Duct–>Nasal Cavity (Inferior Meatus)

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12
Q

Where does the lacrimal secretion drain into the nasal cavity?

A

Inferior Meatus

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13
Q

What are the three continuous outer layers of the eyeball?

A

The Dural Sheeth, Sclera, & Cornea

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14
Q

What is the layer in between the sclera and retina?

A

Choroid

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15
Q

What is the internal layer of the eyeball that contains the special receptors?

A

The Retina

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16
Q

What is the body where the termination of the choroid and the beginning of the iris takes place?

A

Ciliary Body

17
Q

What produces Aqueous Humor (flows from anterior chamber to posterior chamber) of the eye?

A

The Ciliary Process

18
Q

What muscles are in control of the lens? What are they innervated by?

A

The Cilliary muscles. They are Parasympathetically controlled by III

19
Q

What are the two muscles of the Iris? What type of control for each?

A

Sphincter Pupillae–Parasympatheic (Poop/Sphincter…Get It?!) & Dilator Pupillae-Sympathetic(wide eyed and running from saber tooth tiger)

20
Q

What are the “ligaments” that attach the lens to the ciliary muscles?

A

Suspensory Ligaments

21
Q

What happens to the lens on CONTRACTION of the ciliary muscles?

A

ROUND lens

22
Q

What happens to the lens on RELAXATION of the ciliary muscles?

A

FLAT lens (YOU LIE FLAT ON THE GOUND WHEN RELAXED)

23
Q

Where is the most acute vision in the retna? What is the portion that makes the acute vision possible?

A

The macula lutea and the fovea centralis

24
Q

What is the only eye muscle NOT apart of the CTR?

A

The inferior oblique

25
Q

What direction does the Superior Oblique Pull? What region of the eyeball is the SO attached?

A

Down and Out. Attached to the Superior Lateral Posterior aspect of the eyeball

26
Q

What direction does the Inferior Oblique pull?

A

Up and Out

27
Q

What are the eye ball Adductors?

A

Medial Rectus (& Inferior/Superior Rectus to an extent)

28
Q

What are the eyeball ABductors?

A

Superior & Inferior Obliques; Lateral Rectus

29
Q

What are the eyeball elevators?

A

Superior Rectus and Inferior Oblique

30
Q

What are the eyeball depressors?

A

Inferior Rectus and Superior Oblique

31
Q

What are the 4 eyeball rotators?

A

S.O., I.O., I.R. S.R.

32
Q

What are the two divisions of C.N. III when it enters the orbit? What does it innervate?

A

Superior: Superior Rectus, Levator Palpebrae Superioris
Inferior: Medial Rectus, Inferior Rectus, Inferior Oblique

33
Q

What are the only NAMED post ganglionic nerves you will see? What CN are they involved with?

A

Short Ciliary Nerves…CN III

34
Q

What is the test for the interaction between CN VII and CN V? What happens?

A

Coronal Reflex…Touching the cornea with cotton should make BOTH eyes blink..

Head&Neck (17 decks)

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