Eye And Ear

Question 1

What eye muscles perform extorsion

Answer 1

Inferior oblique

Inferior rectus

Question 2

What eye muscles perform intorsion

Answer 2

Sup. Oblique

Sup. Rectus

Question 3

Which muscles depress the eye

Answer 3

Sup. Oblique

Inferior rectus

Question 4

Which muscles elevate the eye

Answer 4

Inferior oblique

Superior rectus

Question 5

What Nerve innervates lateral rectus

Answer 5

Abducens

Question 6

What Nerve innervates superior oblique

Answer 6

Trochlear

Question 7

What movement would clinically test the function of the Trochlear Nerve

Answer 7

Adduction followed by depression

Superior oblique

Question 8

Abducens paralysis would present how ?

Answer 8

Unapposed adduction

Question 9

What Nerve exits the supra orbital foramen to supply the skin of the forehead

Answer 9

Frontal nerve (a branch off ophthalmic)

Question 10

What artery supplies the eye

Answer 10

Ophthalmic (branches off internal carotid)

Question 11

Name the 3 layers/tunics of the eye

Answer 11

Fibrous, vascular, nervous

Question 12

What comprises the vascular tunic

Answer 12

Choroid

Ciliary body

Iris

Question 13

What seperates the anterior and posterior segments of the eye

Answer 13

Lens

Question 14

What separates the anterior and posterior chambers of the anterior segment

Answer 14

Iris/Pupil

Question 15

Briefly describe Glaucoma

Answer 15

Build up of aqueous humor in the eyeball which cannot escape

Question 16

Briefly describe coloboma

Answer 16

Malformation (missing tissue) of the eye

Usually congenital, May be from trauma

Usually of the iris, lens or retina

Question 17

What is Hyphema

Answer 17

Build up of blood between the iris and cornea

Trauma induced

Question 18

What is Ottis Externa

Answer 18

Inflammation/pain/swelling of the external ear

Question 19

What lubricates the eyeball

Answer 19

Tarsal glands

Question 20

What is the conjunctiva

Answer 20

Transparent mucous membrane

Cover inner surface of eyelids and anterior eyeball

Question 21

What produces tears

Answer 21

Lacrimal apparatus

Question 22

What guides the tears into the lacrimal sac

Answer 22

Lacrimal canaliculi

Question 23

Describe the pathway of the tears

Answer 23

1. Lacrimal Gland
2. Canaliculi
3. Lacrimal sac
4. Nasolacrimal duct
5. Inferior nasal meatus

Question 24

Function of Medial Palpebral Ligament

Answer 24

Orbicularis Oculi attaches here

Question 25

What sheaths surround optic nerve

Answer 25

Duran and Arachnoid

Question 26

What is the common tendinous ring

Answer 26

Common attachment site for extrinsic eye muscles

Question 27

Movement required to clinically test inferior oblique

Answer 27

Adduct then elevate

Question 28

Movement required to clinically test inferior rectus

Answer 28

Abduct then depress

Question 29

What movement is required to clinically test the superior rectus

Answer 29

Abduct then elevate

Question 30

Cause of blurry vision

Answer 30

All rays of light not focused on to the Macula

Question 31

Name the two muscles that act on the pupil

Answer 31

Dilator pupillae

Sphincter pupillae

Question 32

What occurs at the ciliary body and lens during distant vision

Answer 32

Cilliary - relaxed

Lens - stretched thin

Question 33

What occurs at the ciliary body and lens during near vision

Answer 33

Ciliary - contracted

Lens - becomes more spherical

Question 34

An open-angled glaucoma is caused by what

Answer 34

Blockage of the scleral venous sinus

Question 35

A closed-angle glaucoma is caused by what

Answer 35

Iris closing off and blocking the drainage angle between iris and lens

Question 36

How may an ear infection affect the tongue

Answer 36

Infection may lead to compression on the Chorda Tympani Nerve

Leading to loss of sensation to anterior 2/3 of the tongue

Question 37

What muscles prevent over vibration of the ossicle bones during gradual noise increase

Answer 37

Tensor tympani

Stapedius