Serial processing in the human somatosensory system
Serial processing in the human somatosensory system
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DOI：
10.1093/cercor/bhh043
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发表时间：
2004-08-01
期刊：
影响因子：
3.7
通讯作者：
Kakigi, R
中科院分区：
文献类型：
--
作者：
Inui, K;Wang, XH;Kakigi, R
尽管动物研究中的许多解剖学和电生理学发现支持躯体感觉处理的分层方案，但每个皮层区域的精确激活时间尚不清楚。因此，我们用脑磁图研究了人类多个皮层区域活动的时间关系。经皮电刺激左手背侧后，我们发现右半球的Brodmann区3b、4、1、5和次级体感皮层区域激活。每种皮层活动的平均起始延迟分别为14.4、14.5、18.0、22.4和21.7 ms。这些激活的起始时间的差异表明，通过中央后回和初级和次级躯体感觉皮层的串行处理模式。
Although numerous anatomical and electrophysiological findings in animal studies have supported a hierarchical scheme of somatosensory processing, precise activation timings of each cortical area are not known. Therefore we examined the temporal relationship of activities among multiple cortical areas using magnetoencephalography in humans. We found activations in Brodmann's areas 3b, 4, 1, 5 and the secondary somatosensory cortex region in the right hemisphere following transcutaneous electrical stimulation of the dorsum of the left hand. The mean onset latencies of each cortical activity were 14.4, 14.5, 18.0, 22.4 and 21.7 ms, respectively. The differences of onset latencies among these activations indicated the serial mode of processing both through the postcentral gyrus and through the primary and secondary somatosensory cortices.