PAIN-RELATED MAGNETIC-FIELDS FOLLOWING PAINFUL CO2-LASER STIMULATION IN MAN

被引:122
作者
KAKIGI, R
KOYAMA, S
HOSHIYAMA, M
KITAMURA, Y
SHIMOJO, M
WATANABE, S
机构
[1] Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, 444, Myodaiji
关键词
PAINFUL STIMULATION; CO2; LASER; MAGNETOENCEPHALOGRAPHY; SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE; 2ND SENSORY CORTEX; PRIMARY SENSORY CORTEX;
D O I
10.1016/0304-3940(95)11604-U
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The initial somatosensory evoked magnetic fields following painful heat stimulation by CO2 laser beam applied to the upper and lower limb were investigated in normal subjects. The main deflections, 'Pain MA' and 'Pain ML' following the arm and leg stimulation, respectively, were identified in the bilateral second sensory cortices (SII). The onset latencies of Pain MA and Pain ML were approximately 150 and 200 ms, respectively. No consistent equivalent current dipole was found in other areas including the primary sensory cortex in each hemisphere. Therefore, we consider that neurons in the bilateral SII are initially activated following painful heat stimulation.
引用
收藏
页码:45 / 48
页数:4
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