Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Veterinary Anatomy > Organ of Vision (Eyeball & Adnexa): CNs II, III, IV, VI > Flashcards

Organ of Vision (Eyeball & Adnexa): CNs II, III, IV, VI Flashcards

1
Q

The organ of vision primarily consists of:

A

eyeball (bulbs oculi)
adnexa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

What is the adnexa comprised of?

A

eyelids (& tunica conjunctiva)
ocular muscles
lacrimal apparatus
orbital fasciae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

In the cat, the bony processes [lateral/medial] to the orbit are, very close or fused

A

lateral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

In dogs, the bony processes [lateral/medial] to the orbit are separated and joined together by the ____. Open orbits help to communicate [cranially/caudally] with the ______ fossa.

A

lateral
orbital ligament
caudally
temporal fossa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In binocular vision, the field of vision is [larger/smaller] than in monocular vision.

A

larger
because there is more decussation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the optic axis of the bulbus oculi?

A

the straight line passing through both poles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the equator of the bulbus oculi?

A

a line equidistant from both poles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the 3 tunics of the eye?

A

external fibrous tunic
middle vascular tunic
internal nervous tunic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What tunic is the translation of visual stimuli into nerve impulses?

A

internal nervous tunic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the comprised of the external fibrous tunic?

A

cornea (transparent)
sclera (white)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The _____ is in between the cornea and sclera

A

limbus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is in the middle vascular tunic?

A

iris
ciliary body
choroid (which provides blood to posterior portion of eyeball & pigment)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Label 1-3

A
  1. iris
  2. ciliary body
  3. choroid
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The middle vascular tunic is also known as the ______

A

uvea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The function of the iris is to _____

A

adjust the size of the pupil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The ______ divides the space between the lens and cornea into anterior and posterior chambers that communicate through the pupil. Both are filled with ________

A

iris
aqueous humor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Label 1-2

A
  1. anterior chamber
  2. posterior chamber
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The iris contains two layers of ________, which is a ______ of the pupil and a ______ of the pupil

A

smooth muscle
sphincter
dilator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Miosis is GVE [sympathetic/parasympathetic] and involves the [sphincter/dilator] of the pupil, and mydriasis is GVE [sympathetic/parasympathetic] and involves the [sphincter/dilator] of the pupil.

A

miosis: GVE parasympathetic, sphincter of pupil
mydriasis: GVE sympathetic, dilator of pupil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

_______ do the accommodation - the ability of the eye to focus on near or distant objects by changing the shape of the ______

A

smooth ciliary muscle
lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What does the ciliary body do?

A

suspend the lens, regulate its curvature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the ciliary body?

A

a raised ring with ridges converging toward the lens in the center

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Label 1-3

A
  1. smooth ciliary muscle
  2. ciliary process
  3. zonular fibers
23
Q

Label 1-4

A
  1. ciliary body
  2. lens
  3. cornea
  4. lens
24
Q

What is the reflex of accommodation?

A

focusing on near objects

25
Q

How does accommodation occur?

A

by a concerted action of the ciliary muscle on the zonule fibers which hold the lens in place

26
Q

Ciliary muscles are a ring of smooth muscle that upon [contraction/relaxation], relaxes the tension on the zonular fibers and allows the lens to become [flatter/more spherical]

A

contraction
more spherical

27
Q

The accommodation reflex has [sympathetic/parasympathetic] innervation from CN ______

A

parasympathetic
CN III - oculomotor n.

28
Q

What is the light-reflecting area of the eye?

A

tapetum lucidum

29
Q

The _______ is the blood supply to the eye

A

choroid

30
Q

What is the middle vascular tunic?

A

dense network of blood vessels embedded in heavily pigmented connective tissue

31
Q

Label 1-3

A
  1. choroid
  2. tapetum lucidum
  3. optic disc
32
Q

The retina is in what part of the eye?

A

internal nervous tunic

33
Q

What is the retina?

A

light-sensitive receptor cells

34
Q

What is the optic disc?

A

the area where the axons of the fourth layer concentrate to leave the eye

35
Q

The anterior chamber is between the ____ and ______. It is filled with ______

A

cornea
iris
aqueous humor

36
Q

The posterior chamber is between the _____ and _____. It is filled with _____

A

iris
ciliary-body lens
aqueous humor

37
Q

The vitreous chamber is between the _____ and ______. It is filled with ________

A

ciliary body
retina
vitreous humor

38
Q

Aqueous humor is drained in the _________

A

iridocorneal angle

39
Q

Label 1-3

A
  1. iridocorneal angle
  2. aqueous humor
  3. ciliary processes
40
Q

What does the aqueous humor have a role in? It is produced by _______

A

the maintenance of intraocular pressure
produced by cells of the ciliary processes

41
Q

What are tarsal glands?

A

meibomian glands

42
Q

What muscle opens the eye?

A

levator palpebrae superioris

43
Q

What are the two types of conjunctiva?

A

bulbar conjunctiva
palpebral conjunctiva
they are part of the adnexa

44
Q

Define palpebral conjunctiva

A

covers the deep surface of the eyelids

45
Q

Define fornix (superior) of the conjunctiva

A

blind sac between the palpebral and bulbar conjunctiva

46
Q

What is the bulbar conjunctiva?

A

covers the surface of the sclera

47
Q

Label 1-7

A
  1. bulbar conjunctiva
  2. cornea
  3. fornix (superior)
  4. palpebral conjunctiva
  5. third eyelid
  6. palpebral conjunctiva
  7. fornix (inferior)
48
Q

What is fascia that encapsulates the muscles that move the eye?

A

orbital fasciae

49
Q

List 4 muscles of the eye (there are 7 total, just list 4)

A

dorsal rectus m.
ventral rectus m.
lateral rectus m.
medial rectus m.
retractor bulbi m.
dorsal oblique m.
ventral oblique m.

50
Q

Which muscles of the eye are controlled by CN III?

A

dorsal rectus m.
ventral rectus m.
medial rectus m.
ventral oblique m.

51
Q

Which muscles of the eye are controlled by CN IV?

A

dorsal oblique m. (medial rotation)

52
Q

Which muscles of the eye are controlled by CN VI?

A

lateral rectus m.
retractor bulbi m.

53
Q

The lacrimal apparatus is part of the [eyeball (bulbous oculi)/adnexa]

A

adnexa

54
Q

Label 1-5

A
  1. opening of lacrimonasal duct
  2. lacrimal puncta and canaliculus
  3. lacrimal gland
  4. lacrimal sac
  5. lacrimonasal duct
55
Q

What is this?

A

orbital ligament

Veterinary Anatomy (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions