Clues		Peripheral vertigo	Central vertigo
Findings on Dix-Hallpike maneuver
	Latency of symptoms and nystagmus	2 to 40 seconds	None
	Severity of vertigo	Severe	Mild
	Duration of nystagmus	Usually less than 1 minute	Usually more than 1 minute
	Fatigability*	Yes	No
	Habituation†	Yes	No
Other findings
	Postural instability	Able to walk; unidirectional instability	Falls while walking; severe instability
	Hearing loss or tinnitus	Can be present	Usually absent
	Other neurologic symptoms	Absent	Usually present