Pang Cheuk Yee, Müller Matthias M
Institute of Psychology, University of Leipzig, 04109 Leipzig, Germany.
Institute of Psychology, University of Leipzig, 04109 Leipzig, Germany.
Biol Psychol. 2017 Apr;125:154-162. doi: 10.1016/j.biopsycho.2017.03.010. Epub 2017 Mar 18.
We investigated the effect of visual separation of left and right hemispaces within peripersonal space to sustained tactile spatial attention processing and showed that visually perceived object separation weakened the competitive interaction for concurrent vibrotactile stimulation to two hands. Participants received concurrent vibrotactile stimulation at different frequencies on two hands (right: 20Hz; left: 24Hz) for 4500ms to elicit steady-state somatosensory evoked potentials (SSSEPs). They attended to one of the stimulated hands and reacted to rare transient events embedded in the attended ongoing stream. Behavioral and neurophysiological results reveal that separation of spatial representation of tactile event locations could facilitate bilateral tactile spatial selection in sustained attention processing. Visual separation by a gap between hands increased the magnitude of attentional gain in SSSEPs compared to the situation when no gap was present. Results suggest that visual separation resolved the competition between concurrent tactile stimulation on two hands.
我们研究了在个人空间周围对左右半空间进行视觉分隔对持续触觉空间注意力加工的影响，结果表明，视觉上感知到的物体分隔减弱了两只手同时进行振动触觉刺激时的竞争交互作用。参与者双手同时接受不同频率的振动触觉刺激（右手：20Hz；左手：24Hz），持续4500毫秒，以诱发稳态体感诱发电位（SSSEPs）。他们专注于受刺激的一只手，并对嵌入在持续关注流中的罕见瞬态事件做出反应。行为和神经生理学结果表明，触觉事件位置的空间表征分离可以促进持续注意力加工中的双侧触觉空间选择。与没有间隙的情况相比，双手之间的间隙造成的视觉分隔增加了SSSEPs中注意力增益的幅度。结果表明，视觉分隔解决了两只手同时进行触觉刺激之间的竞争。
