The differences between central lesions and peripheral lesions following a Dix–Hallpike manoeuvre41
| Central lesions | Peripheral lesions | |
|---|---|---|
| Duration of nystagmus | Persistent | Less than 60 s |
| Onset of nystagmus | Immediate | Delay of 0–40 s |
| Fatiguability of nystagmus | Non-fatiguable | Fatiguable |
| Character of nystagmus | Variable | Fixed: torsional upwards towards the lower most ear |
| Severity of symptoms | Mild (but marked nystagmus) | Severe vertigo with nausea. |