Magnetoencephalography in the study of human somatosensory cortical processing

被引:256
作者
Hari, R [1 ]
Forss, N
机构
[1] Aalto Univ, Low Temp Lab, Brain Res Unit, FIN-02015 Espoo, Finland
[2] Univ Helsinki, Cent Hosp, Dept Clin Neurosci, FIN-00290 Helsinki, Finland
关键词
human; somatosensory cortex; SI; SII; magnetoencephalography;
D O I
10.1098/rstb.1999.0470
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Magnetoencephalography (MEG) is a totally non-invasive research method which provides information about cortical dynamics on a millisecond time-scale. Whole-scalp magnetic field patterns following stimulation of different peripheral nerves indicate activation of an extensive cortical network. At the SI cortex, the responses reflect mainly the activity of area 3b, with clearly somatotopical representations of different body parts. The SII cortex is activated bilaterally and it also receives, besides tactile input, nociceptive afference. Somatically evoked MEG signals may also be detected from the posterior parietal cortex, central mesial cortex and the frontal lobe. The serial versus parallel processing in the cortical somatosensory network is still under debate.
引用
收藏
页码:1145 / 1154
页数:10
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