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Spinal Final > Eyes/Ears > Flashcards

Eyes/Ears Flashcards

1
Q

What are the names of the layers of the eyeball?

A

Fibrous tunic, uveal tract, and retina

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2
Q

What are the parts of the uveal tract of the eyeball?

A

Iris, ciliary body, choroid, and pupil

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3
Q

What are the receptor neurons of the second cranial nerve?

A

Rod and cone photoreceptor cells

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4
Q

What is the function of the rod cell?

A

Provide vision in dim light conditions

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5
Q

What is the function of the cone cell?

A

Provide vision in bright light conditions and mediate color vision

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6
Q

What is the most numerous photoreceptor cell?

A

Rod cell

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7
Q

What forms the optic nerve?

A

Axons of ganglion cells

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8
Q

What is the location of the anterior chamber of the eyeball?

A

Between the cornea and iris

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9
Q

What is the location of the posterior chamber of the eyeball?

A

Between the iris and lens

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10
Q

What is contained in the anterior chamber of the eyeball?

A

Aqueous humor

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11
Q

What is the name given to the chamber behind the lens?

A

Vitreous chamber

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12
Q

What is the location of the vitreous chamber?

A

Behind the lens, in front of the retina

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13
Q

What fills the vitreous chamber?

A

Vitreous body

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14
Q

What are the functions of the vitreous body?

A

Maintain retinal curvature; allow minimal light distortion from lens to retina

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15
Q

What are the common characteristics in origin and insertion of all rectus extraocular muscles?

A

They all originate from a common annular tendon in the orbit

They all insert into the sclera in front of the coronal equator of the eyeball

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16
Q

What is the common characteristic regarding the insertion of both oblique extraocular muscles?

A

Both insert onto sclera on the lateral margin of the eyeball behind the coronal equator

17
Q

What is the source of innervation of the specific intrinsic eye muscles?

A

Parasympathetic fibers from oculomotor nerve-ciliaris, sphincter pupillae sympathetic fibers from internal carotid artery plexus-dilator pupillae

18
Q

What are the two unique features of the fourth cranial nerve?

A

It is the only cranial with an apparent origin from the dorsal surface of the brain; it is the only cranial efferent nerve to decussate within the midbrain from its nucleus

19
Q

Visceral efferent fibers conveyed in the third cranial nerve originate from which nucleus?

A

Accessory oculomotor nucleus of Edinger/Westphal

20
Q

What is the location of synapse for preganglionic parasympathetic efferent fibers of the third cranial nerve?

A

Ciliary ganglion

21
Q

Postganglionic parasympathetic efferent fibers of the third cranial nerve are carried in which nerve?

A

Short ciliary nerve

22
Q

What is unique about the vascular supply of the retina?

A

A single vessel supplies it

23
Q

What vessel supplies the inner tunic of the eyeball?

A

Central artery of the retina

24
Q

What is the name given to the palpable posterior projection corresponding to the triangular fossa of the auricle?

A

Eminentia triangularis

25
Q

What is the name given to the palpable posterior projection corresponding to the concha of the auricle?

A

Eminentia concha

26
Q

What is the name of the palpable posterior projection of the eminentia concha of the auricle?

A

Ponticulus

27
Q

The auricle will receive sensory innervation via which specific cranial nerve branches?

A 
Auriculotemporal nerve (mandibular division, trigeminal)
Posterior auricular cutaneous nerve (facial)
Auricular nerve (vagus)
28
Q

Skin lining the external acoustic meatus contains what modified sebaceous glands?

A

Ceruminous glands

29
Q

What is cerumen?

A

The product of ceruminous glands forming the bulk of ear wax

30
Q

What vein is formed within the parotid gland?

A

The retromandibular vein

31
Q

What branch of the facial nerve penetrates the parotid gland but is not given off within it?

A

The chorda tympani nerve

Spinal Final (6 decks)

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