Hari R, Forss N
Brain Research Unit, Helsinki University of Technology, Espoo, Finland.
Philos Trans R Soc Lond B Biol Sci. 1999 Jul 29;354(1387):1145-54. doi: 10.1098/rstb.1999.0470.
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.
脑磁图（MEG）是一种完全无创的研究方法，可在毫秒时间尺度上提供有关皮层动力学的信息。刺激不同外周神经后，全头皮磁场模式表明广泛的皮层网络被激活。在初级体感皮层（SI），反应主要反映3b区的活动，不同身体部位有清晰的躯体定位表征。次级体感皮层（SII）双侧被激活，除触觉输入外，它还接收伤害性传入信号。体感诱发的MEG信号也可从顶叶后皮质、中央内侧皮质和额叶检测到。皮层体感网络中的串行与并行处理仍存在争议。
