Broad-frequency rotatory testing.
The method of broad-frequency-band rotatory testing with results from normal subjects and patients with peripheral uni- and bilateral loss as well as central vestibular disorders are reviewed. The following conclusions are drawn: adequate testing of the vestibulo-ocular reflex including side detection of unilateral loss in light or in darkness can only be done with either random or high-frequency (2.5-3 Hz) sinusoidal stimulation. Measurements of compensatory eye movements at lower frequencies where vestibular and non-vestibular signals interact are of interest for central vestibular diagnosis. A decreased ability to suppress vestibular nystagmus is not an uncommon finding in patients with large acoustic neuromas or pathology in the brainstem or cerebellum.
Hydén
D
D
Department of Otalaryngology, Linköping University, Sweden.
Larsby
B
B
Odkvist
L M
LM
D002493:Central Nervous System Diseases / Q000175:diagnosis; D006801:Humans; D007759:Labyrinth Diseases / Q000175:diagnosis; D009464:Neuroma, Acoustic / Q000175:diagnosis; D009760:Nystagmus, Physiologic; D012027:Reflex, Vestibulo-Ocular; D012399:Rotation; D014724:Vestibular Function Tests; D014722:Vestibule, Labyrinth