Ocular torsion responses to electrical vestibular stimulation in vestibular schwannoma
| Autor: | Stuart W, Mackenzie, Richard, Irving, Peter, Monksfield, Raghu, Kumar, Attila, Dezso, Raymond F, Reynolds |
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| Rok vydání: | 2018 |
| Předmět: |
Male
genetic structures Eye Movements Asymmetry ratio Posture Neuroma Acoustic Middle Aged Vestibular Evoked Myogenic Potentials eye diseases Article body regions Vestibular schwannoma Head Movements otorhinolaryngologic diseases Humans Head impulse test Female Electrical vestibular stimulation sense organs Aged |
| Zdroj: | Clinical Neurophysiology |
| ISSN: | 1872-8952 |
| Popis: | Highlights • Electrical vestibular stimulation (EVS)-evoked eye movements are trackable with an infrared camera. • Unilateral vestibular schwannoma attenuated the ocular torsion response to EVS. • EVS-evoked ocular torsion responses provide a convenient, non-invasive vestibular assessment. Objectives We determined if eye movements evoked by Electrical Vestibular Stimulation (EVS) can be used to detect vestibular dysfunction in patients with unilateral vestibular schwannoma (VS). Methods Ocular torsion responses to monaural sinusoidal EVS currents (±2 mA, 2 Hz) were measured in 25 patients with tumours ranging in size from Koos grade 1–3. For comparative purposes we also measured postural sway response to EVS, and additionally assessed vestibular function with the lateral Head Impulse Test (HIT). Patient responses were compared to age-matched healthy control subjects. Results Patients exhibited smaller ocular responses to ipsilesional versus contralesional EVS, and showed a larger asymmetry ratio (AR) than control subjects (19.4 vs. 3.3%, p |
| Databáze: | OpenAIRE |
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