Computerized Dynamic Visual Acuity with Volitional Head Movement in Patients with Vestibular Dysfunction
| Autor: | Richard E. Gans, Erika L. Johnson, Theresa H. Chisolm, Richard A. Roberts |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Adult
Male medicine.medical_specialty Visual acuity genetic structures Head (linguistics) Visual Acuity Audiology 03 medical and health sciences 0302 clinical medicine Oscillopsia Blurred vision medicine Humans Treadmill 030223 otorhinolaryngology Aged Analysis of Variance Movement (music) business.industry Vision Tests Reflex Vestibulo-Ocular General Medicine Middle Aged Vestibular Function Tests Vestibular Diseases Otorhinolaryngology Head Movements 030220 oncology & carcinogenesis Reflex Female Vestibulo–ocular reflex medicine.symptom business |
| Zdroj: | Annals of Otology, Rhinology & Laryngology. 115:658-666 |
| ISSN: | 1943-572X 0003-4894 |
| DOI: | 10.1177/000348940611500902 |
| Popis: | Objectives:Patients with uncompensated vestibular dysfunction frequently report blurred vision during head movement, a symptom termed oscillopsia. One way to measure the functional deficit associated with an impaired vestibulo-ocular reflex is by comparing visual acuity from a baseline condition in which there is no head movement to visual acuity obtained during a dynamic condition with head movement. A previously described test incorporated a treadmill upon which patients walked during assessment of visual acuity. The objective of the current investigation was to evaluate an alternative method of assessing dynamic visual acuity that uses volitional head movement instead of walking on a treadmill.Methods:Fifteen participants with normal vestibular function and 16 participants with impaired vestibular function were enrolled. All participants performed the visual acuity task under baseline conditions with no movement and also under dynamic conditions that included 1) walking on a treadmill and 2) volitionally moving their head in the vertical plane.Results:No difference in performance was observed between the treadmill task and the volitional head movement task. Participants with impaired vestibular function performed more poorly under the dynamic conditions than did participants with normal vestibular function.Conclusions:The results suggest that the volitional head movement paradigm may be useful in identification of patients with functional deficits of the vestibulo-ocular reflex. |
| Databáze: | OpenAIRE |
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