Abnormal temporal dynamics of visual attention in spatial neglect patients
Abnormal temporal dynamics of visual attention in spatial neglect patients
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DOI：
10.1038/385154a0
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发表时间：
1997-01-09
期刊：
影响因子：
64.8
通讯作者：
Kennard, C
中科院分区：
文献类型：
--
作者：
Husain, M;Shapiro, K;Kennard, C
当rye识别一个视觉对象，如单词或字母时，如果第二个对象出现在第一个对象的400 ms内（1-5），那么检测第二个对象的能力就会受损。这种现象被称为注意力眨眼或停留时间，是我们随着时间分配注意力（时间注意力）的能力的量度。单侧视觉忽视患者不知道他们病变对侧的人或物体（6，7）。他们被认为有注意空间中特定位置（空间注意力）的障碍（6-11）。在这里，我们研究了非时空动态的注意力在患者中，使用协议评估注意瞬脱。患有右顶叶、额叶或基底节卒中的新生儿患者有异常严重和延长的注意力瞬脱。当他们识别出一个字母时，他们对后续字母的意识明显减弱，持续的时间是没有忽视的毛皮个体的三倍，我们的研究结果首次证明视觉忽视是一种时间和空间上的注意力紊乱。
WHEN rye identify a visual object such as a word or letter, sur ability to detect a second object is impaired if it appears within 400 ms of the first(1-5). This phenomenon has been termed the attentional blink or dwell time and is a measure of our ability Lo allocate attention over time (temporal attention), Patients with unilateral visual neglect are unaware of people or objects contralateral to their lesion(6,7). They are considered to have It disorder of attending to a particular location in space (spatial attention)(6-11). Here we examined the non-spatial temporal dynamics of attention in patients, using a protocol for assessing the attentional blink. Neglect patients with right parietal, frontal or basal ganglia strokes had an abnormally severe and protracted attentional blink. When they identified a letter, their awareness of a subsequent letter was significantly diminished for a length of time that was three times as long as fur individuals without neglect, Our results demonstrate far the first time that visual neglect is a disorder of directing attention in time, as well as space.