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- W2497499874 abstract "Acute unilateral peripheral-vestibular hypofunction (UVH) shifts the subjective visual vertical (SVV) ipsilesionally, triggering central compensation that usually eliminates shifts when upright. We hypothesized that compensation is worse when roll-tilted.We quantified SVV errors and variability in different roll-tilted positions (0°, ±45°, ±90°) in patients with chronic UVH affecting the superior branch (SVN; n=4) or the entire (CVN; n=9) vestibular nerve.Errors in SVN and CVN were not different. When roll-tilted ipsilesionally 45° (9.6±5.4° vs. -0.2±6.4°, patients vs. controls, p<0.001) and 90° (23.5±5.7° vs. 16.8±8.8°, p=0.003), the patient's SVV was shifted significantly towards the lesioned ear. When upright, only a trend was noted (3.6±2.2° vs. 0.0±1.2°, p=0.099); for contralesional roll-tilts shifts were not different from controls. Variability was larger for CVN than SVN (p=0.046). With increasing disease-duration, adjustment errors decayed for ipsilesional roll-tilt and upright (p⩽0.025).The reason verticality perception was distorted for ipsilesional roll-tilts, may be the insufficient integration of contralesional otolith-input. Similar errors in SVN and CVN suggest a dominant utricular role in verticality perception, albeit the sacculus may improve precision of SVV estimates.With deficiencies in central compensation being roll-angle dependent, extending SVV-testing to roll-tilted positions may improve identifying patients with chronic UVH." @default.
- W2497499874 created "2016-08-23" @default.
- W2497499874 creator A5014748846 @default.
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- W2497499874 date "2016-10-01" @default.
- W2497499874 modified "2023-09-23" @default.
- W2497499874 title "Spatial orientation in patients with chronic unilateral vestibular hypofunction is ipsilesionally distorted" @default.
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- W2497499874 doi "https://doi.org/10.1016/j.clinph.2016.07.010" @default.
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