Nikolov N D, Stoilova I M
Brain Research Institute, Bulgarian Academy of Sciences.
Acta Physiol Pharmacol Bulg. 1990;16(3):11-21.
Spectral correlation methods of EED-analysis were used to study the local synchronization (by power spectra--FFT) and the spatial synchronization (by assessing the coherence functions) of the cortical electrical activity of persons subjected to prolonged (one-month) extreme impact--hyperbaric conditions. Two neurophysiological mechanisms of system functional organization of the electrical activity of the central nervous system are described, through which the brain compensates its reduced functional capacities under the extreme conditions studied (including boundary physiological states). These mechanisms: (a) act in almost all situations of the extreme impact, irrespective of the scope of the remaining varied transient or lasting readjustments in the EEG, and (b) guarantee spatial interactions in the electrical activity in the brain in frequency ranges which are essential for its functions: alpha (8-12 Hz) and beta-2 (24-36 Hz).
采用脑电图（EED）分析的频谱相关方法，研究了长期（一个月）处于极端环境——高压条件下的人员的皮质电活动的局部同步性（通过功率谱——快速傅里叶变换）和空间同步性（通过评估相干函数）。描述了中枢神经系统电活动系统功能组织的两种神经生理机制，通过这两种机制，大脑在研究的极端条件下（包括临界生理状态）补偿其降低的功能能力。这些机制：（a）在几乎所有极端影响的情况下都起作用，与脑电图中其余各种短暂或持续调整的范围无关；（b）确保大脑电活动在对其功能至关重要的频率范围内进行空间相互作用：α（8 - 12赫兹）和β - 2（24 - 36赫兹）。
