Brainscape's Knowledge GenomeTM

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


See full index

MED220 > Lecture11: Eye And Cranial Nerves > Flashcards

Lecture11: Eye And Cranial Nerves Flashcards

1
Q

What makes up the floor of the Boney Orbit?

A

Maxilla and Zygomatic

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

What makes up the roof of the Boney Orbit?

A

The lesser wing of sphenoid, and orbital plate of frontal bone

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

What makes up the Medial Wall of the Boney Orbit?

A

The Frontal process of maxilla, Lacrimal Bone, and Orbital plate of Ethmoid bone

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

What makes up the medial wall of the Boney Orbit?

A

The Greater wing of sphenoid and zygomatic bone

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

What does the Outer Fibrous Coat contain?

A

The Sclera and Cornea

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

What is the function of the conjunctiva?

A

The formation of the conjunctival sac

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

What does the Vascular Body contain?

A

Choroid, ciliary body and iris

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

What is the function of the choroid?

A

The absorption of light that may scatter

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

What is the function of the ciliary body?

A

Production of aqueous humour by the ciliary processes, the muscle controls the shape of the lens

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

What is the Function of the Sphincter Papillae in the iris?

A

Circular fibres to constrict the pupil, has Para Sympathetic supply

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

What is the Function of the Dilator Papillae and it’s supply?

A

Widening of Pupil, Sympathetic supply

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

What is the Function of the Outer Pigmented layer of the Nervous coat

A

Prevention of scattering of light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the Outer Pigmented Layer a source of?

A

Vitamin A

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

What does the Inner neural layer of the Nervous Coat contain?

A

Photoreceptors

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

Explain Glaucoma

A

An increase in Aqeuous humor and Intraoccular pressure due to Schlemm canal blockage

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

What are the Symptoms of Glaucoma?

A

Headache, Pain, redness in the eye and Blurred vision

17
Q

Which segment is concerned with focusing of light?

A

Anterior Segment

18
Q

What is the segment where light is converted into impulses in the optic nerve?

A

Posterior Segment

19
Q

What is the Posterior Segment filled with?

A

Vitreous humor

20
Q

What is the origin of the 4 rectus muscles?

A

Tendinous Canal

21
Q

What is the function and nerve supply of the Superior Rectus?

A

Elevation and Adduction, Occulomotor nerve

22
Q

What is the function and nerve supply of the Inferior Rectus?

A

Depression and Adduction, Occulomotor nerve

23
Q

What is the function and nerve supply of the Medial Rectus?

A

Adduction, Occulomotor nerve

24
Q

What is the function and nerve supply of the Lateral Rectus?

A

Abduction, Abducent nerve

25
Q

What is the Superior Oblique origin, nerve supply and function

A

Roof of orbit, Trochlear nerve, Depression and Abduction

26
Q

What is the origin, nerve supply and function of the Inferior Oblique?

A

Floor of orbit, Occulomotor nerve, Elevation and Abduction

27
Q

What is the origin of the Lower Palpebrae Superioris?

A

Roof of Orbit

28
Q

What is the insertion of the Lower Palpebrae Superioris?

A

Upper eyelid

29
Q

What is the nerve supply of the Lower Palpebrae Superioris?

A

Mullers’ Muscle

30
Q

What is the action of the Lower Palpebrae Superioris?

A

Elevation of upper eyelid

31
Q

What is the Occulomotor nerve origin and course?

A

Midbrain by 2 nuclei, through the lateral wall of the cavernous sinus, then superior orbital fissure

32
Q

What is the origin and course of the Trochlear nerve?

A

The Trochlear nuclei, through the lateral wall of cavernous then through the superior orbital fissure

33
Q

What is the branch of the Trochlear nerve?

A

The Superior Oblique muscle

34
Q

What is the origin and course of the Abducent nerve?

A

The Abducent nucleus in pons, inside cavernous sinus then through the superior orbital fissure

35
Q

What is a branch of the Abducent nerve?

A

The lateral Rectus

36
Q

What happens if the Occulomotor nerve is injured?

A

Dilated pupil and downward lateral direction

37
Q

What happens if Trochlear nerve is injured?

A

Eye turns upward medially with diplopia

38
Q

What happens if Abducent nerve is injured?

A

Eye is addicted with diplopia

MED220 (24 decks)

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