Danckert James, Ferber Susanne, Pun Carson, Broderick Carol, Striemer Christopher, Rock Sherry, Stewart Dwight
Department of Psychology, University of Waterloo, Ontario, Canada.
J Cogn Neurosci. 2007 Oct;19(10):1706-20. doi: 10.1162/jocn.2007.19.10.1706.
Recent neuroimaging and neuropsychological studies have suggested that the right hemisphere, particularly frontal regions, is important for the perception of the passage of time. We examined the ability to estimate durations of up to 60 sec in a group of eight patients with unilateral neglect. When estimating multisecond intervals, neglect patients grossly underestimated all durations. On average, healthy controls (HC) demonstrated reasonably accurate estimates of all durations tested. Although the right hemisphere lesioned control patients without neglect also tended to underestimate durations, these underestimations were significantly better than the performance of the neglect group. These findings suggest a pivotal role for a right hemisphere fronto-parietal network in the accurate perception of multisecond durations. Furthermore, these findings add to a growing body of literature suggesting that neglect cannot be understood simply in terms of a bias in orienting attention to one side of space. Additional deficits of the kind demonstrated here are likely to be crucial in determining the nature and extent of the loss of conscious awareness for contralesional events.
近期的神经影像学和神经心理学研究表明，右半球，尤其是额叶区域，对于时间流逝的感知非常重要。我们对一组8名单侧忽视患者估计长达60秒时长的能力进行了测试。在估计数秒时长时，忽视患者严重低估了所有时长。平均而言，健康对照者（HC）对所有测试时长的估计较为准确。虽然没有忽视症状的右侧半球受损对照患者也倾向于低估时长，但这些低估情况明显好于忽视组的表现。这些发现表明，右半球额顶网络在准确感知数秒时长中起关键作用。此外，这些发现进一步丰富了越来越多的文献资料，表明不能简单地将忽视理解为在空间一侧定向注意时的偏差。此处所展示的这类额外缺陷可能对于确定对侧事件意识丧失的性质和程度至关重要。
