The spatial distribution of attentional selectivity in touch: evidence from somatosensory ERP components
The spatial distribution of attentional selectivity in touch: evidence from somatosensory ERP components
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DOI：
10.1016/s1388-2457(03)00107-x
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发表时间：
2003-07-01
影响因子：
4.7
通讯作者：
Forster, B
中科院分区：
文献类型：
--
作者：
Eimer, M;Forster, B
目的：测量体感事件相关脑电位（ERP），以研究触觉选择性注意的空间分布，以及触觉注意力的焦点是否可以在身体表面的非连续区域之间分割。方法：在每次试验中，振动触觉刺激被传递到右手的 4 个可能位置之一。参与者必须关注一两个地点，以便检测那里不常出现的目标刺激。 ERP 被记录到有人值守和无人值守位置的触觉非目标。结果：针对一根手指与另一根手指的注意力通过感觉特异性 P100 分量的幅度调制和随后的注意力负性 (Nd) 来反映。与指间选择相比，指内选择的这些影响较小。当注意力同时指向非相邻的手指时，响应传递到空间和解剖学介入手指的刺激的 ERP 没有表现出任何注意力调节。结论：将触觉空间注意力分配给一根手指而不是另一根手指会影响早期特定形态的体感处理阶段，并且手内注意力选择性的这些影响随着与当前注意力焦点距离的增加而逐渐减弱。与视觉不同，触觉注意力的焦点可以分开，并同时定向到非相邻区域，从而将空间和解剖学上的中间区域排除在注意力处理之外。 (C) 2003 年国际临床神经生理学联合会。由爱思唯尔科学爱尔兰有限公司出版。保留所有权利。
Objective: Somatosensory event-related brain potentials (ERPs) were measured to investigate the spatial distribution of selective attention in touch, and whether the focus of tactile attention can be split between non-contiguous areas of the body surface.Methods: On each trial, vibratory tactile stimuli were delivered to one of 4 possible locations of the right hand. Participants had to attend to either one or two locations in order to detect infrequently presented target stimuli there. ERPs were recorded to tactile non-targets at attended and unattended locations.Results: Attention directed to one finger versus another was reflected by amplitude modulations of the sensory-specific P100 component and a subsequent attentional negativity (Nd). These effects were smaller for within-finger as compared to between-finger selection. When attention was directed simultaneously to non-adjacent fingers, ERPs in response to stimuli delivered to spatially and anatomically intervening fingers showed no attentional modulations whatsoever.Conclusions: Allocating tactile-spatial attention to one finger versus another affects early modality-specific somatosensory processing stages, and these effects of within-hand attentional selectivity decrease gradually with increasing distance from the current attentional focus. Unlike vision, the focus of tactile attention can be split, and directed simultaneously to non-adjacent areas, thus excluding spatially and anatomically intermediate regions from attentional processing. (C) 2003 International Federation of Clinical Neurophysiology. Published by Elsevier Science Ireland Ltd. All rights reserved.