Brainscape's Knowledge GenomeTM

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


See full index

PNS > Cranial Nerve 6 > Flashcards

Cranial Nerve 6 Flashcards

1
Q

What is another name for Cranial Nerve 6?

A

Abducens

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

What type of information does C.N.6 have: sensory, motor, or mixed?

A

Motor

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

What is the only muscle that C.N.6 supplies?

A

Lateral Recus

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

Where is the abducens nucleus located?

A

Caudal part of the pons, Floor of rhomboid fossa

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

What way do the axons from the abducens nucleus project?

A

Anteriorward

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

Where do the axons from the abducens nucleus exit the CNS?

A

At the inferior border of the pons

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

Abducens nucleus relieves information from what structures?

A
  1. Cerebral Cortex (BRDMN area 8)
  2. Sup. Colliculus
  3. MLF
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the pathway of the abducens nucleus?

A

Penetrates the dura, travels along the cavernous sinus, exits the skull thru Sup. Orbit Fissure

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

What is a strabismus and what is the difference btwn an internal and an external strabismus?

A

Eyes are always looking a different direction; will never be able to focus in
Internal strabismus-deviates medially
External strabismus-deviates laterally

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

What is diplopia?

A

Double vision

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

What is difficult about diplopia?

A

It is subjective (no good way to test)

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

What is it called when you have unilateral eyelid droop?

A

Ptosis

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

What muscle is usually weak in ptosis?

A

Levator palpebrae superioris

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

What are the 3 things associated with external ophthalmoplegia?

A

1.External strabismus-diverges down and out
2.Diplopia
3.Ptosis
This is an oculomotor paralysis

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

What is involved with internal ophthalmoplegia?

A
  1. Inability to constrict pupil

2. Loss of light and accommodation reflexes

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

What are some etiologies with oculomotor paralysis?

A
  1. Uncal herniation
  2. PCA aneurysms
  3. Diabetes
17
Q

What clinical consideration is rare and has an internal strabismus?

A

Trochlear paralysis

18
Q

Which clinical consideration is common and also has a internal strabismus?

A

Abducens paralysis

19
Q

What clinical consideration involves damage to the MLF

A

Internuclear ophthalmoplegia

20
Q

What muscles nerve supply is oculomotor sup.ramus?

A
  1. Levator palpebrae superoris

2. Sup. Rectus

21
Q

What muscles nerve supply is the oculomotor inf. Ramus?

A
  1. Medial rectus
  2. Inferior rectus
  3. Inferior Oblique
22
Q

What muscles nerves supply is the occulomotor via Ciliary ganglion.

A
  1. Ciliaris

2. Pupillary constrictor

PNS (7 decks)

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