Subjective Visual Vertical in Pitch and Roll in Right Hemispheric Stroke
Subjective Visual Vertical in Pitch and Roll in Right Hemispheric Stroke
复制标题
右半球行程中俯仰和横滚的主观视觉垂直
作者：
A. Saj;J. Honoré;T. Bernati;Y. Coello;M. Rousseaux
背景和目的：右半球卒中患者通常在额面（侧倾）表现出主观视觉垂直（SVV）的前向偏移。然而，在矢状（俯仰）平面上发生类似疾病的情况从未被评估过。我们调查了这些患者在两个平面上的主观视觉垂直。8名患者，4名空间忽视（N+）和4名无忽视（N-），与4名健康参与者（C）进行比较。他们坐在一个发光的酒吧可调旋转，无论是在滚动或在俯仰平面，并定向在一个垂直的位置，在黑暗中。结果-与N-（-0.1 °）和C（+1.1°）组相比，N+患者的SVV在音高方面存在显著的向后偏移（-4.5 °）。与其他研究一致，他们还显示出与N-（-1.9 °）和C（+0.4°）受试者相比，侧倾时SVV的显著反方向偏差（-8.8 °）。这与两个平面中的相反躯干偏离有关。结论-在确认额面已经报道的前向偏移的同时，我们首次发现忽视患者的SVV向后偏移，这与他们的平衡障碍有关。
Background and Purpose— Patients with right hemispheric stroke usually present an anticlockwise deviation of the subjective visual vertical (SVV) in the frontal (roll) plane. However, the occurrence of a similar disorder in the sagittal (pitch) plane has never been assessed. We investigated the subjective visual vertical in both planes in those patients. Methods— Eight patients, 4 with spatial neglect (N+) and 4 without neglect (N−), were compared with 4 healthy participants (C). They sat facing a luminous bar adjustable in rotation, either in the roll or in the pitch plane, and had to orient it in a vertical position, in the dark. Results— Compared with N− (−0.1°) and C (+1.1°) groups, N+ patients presented with a significant backward deviation (−4.5°) of the SVV in pitch. In accordance with other studies, they also showed a significant anticlockwise deviation (−8.8°) of the SVV in roll, as compared with N− (−1.9°) and C (+0.4°) subjects. This was associated with an opposite trunk deviation in both planes. Conclusions— While confirming the anticlockwise deviation already reported in the frontal plane, we showed for the first time to our knowledge a backward deviation of the SVV in neglect patients, which has to be put in relation with their balance disorders.