Forss N, Merlet I, Vanni S, Hämäläinen M, Mauguière F, Hari R
Brain Research Unit, Helsinki University of Technology, Espoo, Finland.
Brain Res. 1996 Sep 23;734(1-2):229-35.
We recorded somatosensory evoked fields (SEFs) from 10 healthy subjects to ulnar and median nerve stimuli presented at random intervals of 2.4-21.6 s. The subjects either counted the stimuli or ignored them by reading a book. The stimuli activated in both conditions the contralateral SI cortex, the ipsi- and contralateral SII cortices, and the posterior parietal cortex (PPC), in line with earlier observations. In addition, a novel response was observed in nine subjects at 120-160 ms. It was clearly enhanced by attention and was generated in the mesial cortex of the paracentral lobule, close to the end of the central sulcus.
我们记录了10名健康受试者对以2.4 - 21.6秒的随机间隔施加的尺神经和正中神经刺激的体感诱发电场（SEF）。受试者要么计数刺激，要么通过看书忽略它们。与早期观察结果一致，在两种情况下，刺激均激活了对侧初级体感皮层（SI）、同侧和对侧次级体感皮层（SII）以及顶叶后皮质（PPC）。此外，在9名受试者中观察到了一种新的反应，出现在120 - 160毫秒。这种反应在注意力集中时明显增强，并且产生于中央旁小叶的内侧皮质，靠近中央沟末端。
