Lopez Christophe, Lacour Michel, Magnan Jacques, Borel Liliane
Laboratory of Integrative and Adaptive Neurobiology, University of Provence - CNRS, Marseilles, France.
Neuroreport. 2006 May 29;17(8):797-803. doi: 10.1097/01.wnr.0000221843.58373.c8.
To investigate whether visual field dependence-independence changed after unilateral vestibular loss, Menière's patients were tested before and after unilateral vestibular neurotomy and compared with controls. Using the rod and frame test, visual vertical perception was tested under four visual contexts (with a frame tilted either clockwise or counterclockwise, with a vertical frame, and without visual reference). Both controls and Menière's patients before unilateral vestibular loss split into visual field dependent and independent subpopulations. Unilateral vestibular loss did not change this partition but, for both subpopulations, it induced asymmetrical visual field dependence with a reduced or abolished contralesional dependence. Finally, when vertical/horizontal references were provided, visual vertical perception was improved in both subpopulations, suggesting that all patients relied on the same allocentric strategy.
为了研究单侧前庭丧失后视野依赖 - 独立性是否发生变化，对梅尼埃病患者在单侧前庭神经切断术前和术后进行了测试，并与对照组进行比较。使用杆框测试，在四种视觉情境下（框架顺时针或逆时针倾斜、垂直框架以及无视觉参照）测试视觉垂直感知。对照组和单侧前庭丧失前的梅尼埃病患者均分为视野依赖和独立亚组。单侧前庭丧失并未改变这种划分，但对于两个亚组而言，它引发了不对称的视野依赖，对侧的依赖减少或消失。最后，当提供垂直/水平参照时，两个亚组的视觉垂直感知均得到改善，这表明所有患者都依赖相同的以自身为中心的策略。
