Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Differentiation between peripheral and central nystagmus
| Characteristics | Peripheral | Central |
|---|---|---|
| Direction | Mixed torsional-horizontal | Varies: pure vertical, torsional, or horizontal |
| Mixed | ||
| Change of direction | Unidirectional: contralesional | Varies: unidirectional or direction changing |
| Effect of fixation | Suppression | Varies: increased, decreased, or no effect |
| Adaptation | Within days | Often persists |
| Other neurologic deficits | No | Often |
