PAIN-RELATED MAGNETIC-FIELDS FOLLOWING PAINFUL CO2-LASER STIMULATION IN MAN
PAIN-RELATED MAGNETIC-FIELDS FOLLOWING PAINFUL CO2-LASER STIMULATION IN MAN
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DOI：
10.1016/0304-3940(95)11604-u
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发表时间：
1995-06-02
影响因子：
2.5
通讯作者：
WATANABE, S
中科院分区：
文献类型：
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作者：
KAKIGI, R;KOYAMA, S;WATANABE, S
本文研究了正常人上、下肢经CO_2激光热痛刺激后体感诱发磁场的变化。在双侧第二感觉皮层（SII）中分别确定了手臂和腿部刺激后的主要偏转“疼痛MA”和“疼痛ML”。疼痛MA和疼痛ML的发作延迟分别约为150和200 ms。在包括初级感觉皮层在内的其他区域，没有发现一致的等效电流偶极子。因此，我们认为，在双侧SII的神经元最初激活后疼痛的热刺激。
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.