Temporal dynamics of neural activity underlying unconscious processing of manipulable objects
Temporal dynamics of neural activity underlying unconscious processing of manipulable objects
复制标题
可操纵物体无意识处理背后的神经活动的时间动态
DOI：
10.1016/j.cortex.2013.09.005
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发表时间：
2014
期刊：
影响因子：
3.6
通讯作者：
Kakigi R
中科院分区：
文献类型：
--
作者：
Suzuki M.;Noguchi Y.;Kakigi R
灵长类动物的视觉系统被认为包括两个主要通路：一个腹侧通路用于形状和颜色感知，一个背侧通路用于空间处理和视觉运动控制。先前的研究一致报道，在可操作的物体图像（如工具）诱导下，背侧通路（特别是顶叶下区）强烈激活。然而，在无意识感知下，背侧通路是否保留这种对工具图像的优先活动是有争议的。在本研究中，我们使用脑磁图（MEG）研究了对可见和不可见工具图像的神经反应的时空动态。可见工具图像的呈现在左半球顶叶区域引起强烈的神经反应，在400毫秒时达到峰值。当有意识地感知工具图像被眼间抑制时，左顶叶区域对工具信息处理的独特反应仍然被观察到。此外，对神经振荡信号的分析表明，μ节律（8-13 Hz）是由可见和不可见工具引起的运动执行或图像的神经指标。这些结果表明，处理工具信息的神经回路在无意识感知下被保留，突出了背侧通路的隐式方面。
The primate visual system is assumed to comprise two main pathways: a ventral pathway for shape and color perception and a dorsal pathway for spatial processing and visuomotor control. Previous studies consistently reported strong activation in the dorsal pathway (especially in the inferior parietal region) induced by manipulable object images such as tools. However, it is controversial whether the dorsal pathway retains this preferential activity to tool images under unconscious perception. In the present study, we used magnetoencephalography (MEG) and investigated spatio-temporal dynamics of neural responses to visible and invisible tool images. A presentation of visible tool images elicited a strong neural response over the parietal regions in the left hemisphere peaking at 400 msec. This response unique to the processing of tool information in the left parietal regions was still observed when conscious perception of tool images was inhibited by interocular suppression. Furthermore, analyses of neural oscillation signals revealed a suppression ofμrhythm (8–13 Hz), a neural index of movement execution or imagery, induced by both visible and invisible tools. Those results indicated that the neural circuit to process the tool information was preserved under unconscious perception, highlighting an implicit aspect of the dorsal pathway.