Cavézian Céline, Rossetti Yves, Danckert James, d'Amato Thierry, Dalery Jean, Saoud Mohamed
UCBL1, EA 3092, CH Le Vinatier, 95 Boulevard Pinel, 69677 Bron Cedex, France.
Brain Cogn. 2007 Feb;63(1):85-90. doi: 10.1016/j.bandc.2006.07.007. Epub 2006 Sep 1.
Several visuo-motor tasks can be used to demonstrate biases towards left hemispace in schizophrenic patients, suggesting a minor right hemineglect. Recent studies in neglect patients used a new number bisection task to highlight a lateralized defect in their visuo-spatial representation of numbers. To test a possible lateralized representational deficit in schizophrenia, we used the number bisection task in 11 schizophrenic patients compared to 11 healthy controls. Participants were required to orally indicate the central number of an interval orally presented. Whereas healthy subjects showed no significant bias, schizophrenic patients presented a significant leftward bias. Therefore, these results suggest an impairment in higher order representations of the number space in patients with schizophrenia, an impairment that is qualitatively similar to the deficit described in neglect patients.
可以使用几种视觉运动任务来证明精神分裂症患者对左半空间存在偏向，这表明存在轻微的右半侧忽视。最近针对忽视患者的研究使用了一种新的数字二等分任务，以突出他们在数字视觉空间表征中的侧化缺陷。为了测试精神分裂症中可能存在的侧化表征缺陷，我们对11名精神分裂症患者和11名健康对照者使用了数字二等分任务。参与者需要口头指出口头呈现的区间的中间数字。健康受试者没有表现出明显的偏向，而精神分裂症患者则表现出明显的向左偏向。因此，这些结果表明精神分裂症患者在数字空间的高阶表征方面存在损伤，这种损伤在性质上与忽视患者所描述的缺陷相似。
