Bilateral Vestibular Loss, Oscillopsia, and the Cervico‐Ocular Reflex
| Autor: | Hugh O. Barber, Mabel Mai, Brian R. Chambers |
|---|---|
| Rok vydání: | 1985 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent Eye Movements genetic structures Labyrinth Diseases Vision Disorders Fixation Ocular Audiology 03 medical and health sciences 0302 clinical medicine Oscillopsia Reflex Caloric Tests Humans Medicine 030223 otorhinolaryngology Aged business.industry Caloric theory Eye movement Middle Aged Adaptation Physiological Reflex Acoustic Otorhinolaryngology 030220 oncology & carcinogenesis Vestibule Fixation (visual) Female Surgery Vestibule Labyrinth sense organs Righting reflex medicine.symptom Vestibulo–ocular reflex business |
| Zdroj: | Otolaryngology–Head and Neck Surgery. 93:403-407 |
| ISSN: | 1097-6817 0194-5998 |
| DOI: | 10.1177/019459988509300322 |
| Popis: | Oscillopsia during head movement occurs in patients with bilateral vestibular loss and may be transient or persistent. To investigate mechanisms underlying recovery we tested the vestibulo-ocular reflex (VOR), visual-vestibular interaction, and the cervico-ocular reflex (COR); we used a pseudorandom oscillatory stimulus with a frequency band width of 0 to 5 Hz in six patients with bilaterally absent caloric responses and in 10 normal controls. Seven control subjects had low-gain COR responses, but these were anticompensatory with respect to the VOR. Three asymptomatic patients with an absent or grossly deficient VOR had increased oculomotor responses at all frequencies when oscillated in light. Compensatory COR responses were detected in these patients but not in patients with persisting oscillopsia. In some patients with bilateral vestibular loss, augmented cervico-ocular and visual reflexes may compensate, at least partially, for an absent VOR. |
| Databáze: | OpenAIRE |
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