Vestibular vs. Postrotatory Nystagmus

[mrmandrake]

Hey guys,

Need some help here. I'm reading HY Neuro and it says:

For Vestibular (horizontal) Nystagmus:
- the fast phase is in the direction of rotation

For Postrotatory (horizontal) Nystagmus:
- the fast phase is in the opposite direction of rotation

I've tried googling and haven't found a clarification. I have some questions:

1) What exactly is Vestibular Nystagmus? My guess it that it is a nystagmus that arises because of some sort of pathology (lesion of MLF, things like that)
2) What is Postrotatory Nystagmus? My guess is that it's just rotating the patient around in a chair and checking their eyes. I'm not sure what type of diagnostic value this would have, does anyone know?

Thanks for any help.

---

Members don't see this ad.

 

[Waysensei]

I am also interested in the answer to this Q. Might be a bit beyond what is necessary for boards, but is good to know anyway.