Sakamoto Kiwako, Nakata Hiroki, Kakigi Ryusuke
Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki, Japan.
Clin Neurophysiol. 2008 Jul;119(7):1664-73. doi: 10.1016/j.clinph.2008.03.029. Epub 2008 May 12.
To clarify the characteristics relating to the temporal dynamics of the tongue primary somatosensory cortex (SI).
We fabricated individual intraoral devices and recorded somatosensory-evoked magnetic fields (SEFs) from 10 normal subjects. The tongue was stimulated with a concentrated bipolar electrode in four areas: the right and left antero-lateral margins, and the right and left postero-lateral margins.
The primary component was recorded about 19 ms post-stimulation. Six components, termed 1M, 2M, 3M, 4M, 5M, and 6M, respectively, were found within 130 ms of the stimulation. These activities were detected in hemispheres both contralateral and ipsilateral to the stimulation, and were estimated to be located around the tongue SI. In addition, the latency of the contralateral hemisphere was significantly shorter than that of the ipsilateral hemisphere for all components, independent of the area stimulated.
Tactile stimulation of the tongue-elicited activity in the tongue SI in both hemispheres.
This is the first study to investigate the brain responses evoked by stimulating different areas of the tongue, using magnetoencephalography.
阐明与舌部初级体感皮层（SI）时间动态相关的特征。
我们制作了个体化的口腔内装置，并记录了10名正常受试者的体感诱发电场（SEFs）。使用集中双极电极在四个区域刺激舌头：左右前外侧边缘以及左右后外侧边缘。
主要成分在刺激后约19毫秒记录到。在刺激后130毫秒内发现了六个成分，分别称为1M、2M、3M、4M、5M和6M。这些活动在刺激对侧和同侧半球均被检测到，并估计位于舌部SI周围。此外，所有成分的对侧半球潜伏期均显著短于同侧半球，与刺激区域无关。
对舌部的触觉刺激在两个半球的舌部SI中引发活动。
这是第一项使用脑磁图研究刺激舌头不同区域诱发的脑反应的研究。
