BPPN | CPN | |
---|---|---|
Latent period | 2–45 seconds | 0 seconds |
Adaptation | Within 30 seconds | Persisting |
Fatigability | Disappears on repetition | Persists |
Vertigo | Present, sometimes severe | Usually absent, or very mild |
Direction of nystagmus | Torsional and geotropic | Any |
Incidence | Common | Rare |