Saroka Kevin S, Caswell Joseph M, Lapointe Andrew, Persinger Michael A
Human Studies Program, Laurentian University, Sudbury, Ontario, Canada P3E 2C6; Behavioural Neuroscience Program, Laurentian University, Sudbury, Ontario, Canada P3E 2C6.
Human Development Program, Laurentian University, Sudbury, Ontario, Canada P3E 2C6; Behavioural Neuroscience Program, Laurentian University, Sudbury, Ontario, Canada P3E 2C6.
Neurosci Lett. 2014 Feb 7;560:126-30. doi: 10.1016/j.neulet.2013.11.024. Epub 2013 Nov 25.
Interhemispheric coherence for 19 channel EEG activity collected over a three year period from 184 men and women who relaxed in a quiet, darkened chamber showed significant increased coherence between caudal temporal regions for the 11 Hz frequency band during increased (>∼8 nT) global geomagnetic activity at the time of measurement. Detailed analyses from source-localization indicated that a likely origin was the parahippocampal regions whose net differences at 10, 11 and 12 Hz intervals were significantly correlated with geomagnetic activity. Analyses of residuals to obtain a "purer" measure of parahippocampal contributions indicated that interhemispheric temporal lobe coherence across unit increments between 1 and 40 Hz revealed the most statistically significant peaks at 7.5 Hz and 19.5 Hz. These weak but reliable correlations between global geomagnetic activity and the degree of inter-temporal lobe coherence for normal people relaxing in a dark, quiet area are consistent with the results of multiple studies indicating that intrusive experiences such as "presences" or "hallucinations" are more frequent when global geomagnetic activity increases above ∼15-20 nT.
在三年时间里，从184名在安静、黑暗的房间里放松的男性和女性身上收集了19通道脑电图活动，结果显示，在测量时全球地磁活动增强（>∼8 nT）期间，11 Hz频段尾颞区之间的半球间相干性显著增加。源定位的详细分析表明，一个可能的起源是海马旁区域，其在10、11和12 Hz间隔处的净差异与地磁活动显著相关。对残差进行分析以获得海马旁贡献的“更纯净”测量结果表明，1至40 Hz单位增量之间的半球间颞叶相干性在7.5 Hz和19.5 Hz处显示出最具统计学意义的峰值。对于在黑暗、安静区域放松的正常人，全球地磁活动与颞叶间相干程度之间这些微弱但可靠的相关性，与多项研究结果一致；这些研究表明，当地球地磁活动增加到高于∼15 - 20 nT时，诸如“存在感”或“幻觉”等侵入性体验会更频繁出现。
