rotatory nystagmus

Special swinging chairs with electrical controls can be used to induce rotatory nystagmus.

During a positive test, the fast phase of the rotatory nystagmus is toward the affected ear, which is the ear closest to the ground.

Nystagmoid movements of palate and lids, lateral and rotatory nystagmus, cerebellar incoordination.

The primary diagnostic maneuver is the Dix-Hallpike which elicits the cardinal sign associated with BPPV, rotatory nystagmus.