Grindel' O M
Zh Vyssh Nerv Deiat Im I P Pavlova. 1980 Jan-Feb;30(1):62-70.
The study of EEG by means of computer analysis 46 healthy subjects and more than 100 patients with different disturbances of consciousness showed that one of the necessary conditions for performance of reactions to external stimuli and higher nervous activity consists in the maintainance of optimal level of coherence of brain electric processes, corresponding to the optimal cortical tone. Different depths of disturbances revealed different coherence deviations from the optimal level: its overall decrease in case of deep disturbances (coma), a sharp (pessimal) rise in the low frequency rang in sopor and within a wide frequency range in drowsiness in norm. The recovery of consciousness in the post-coma period and at early stages of coma is accompanied by a discordance between the levels of EEG coherence -- a decline in some cortical parts and a sharp rise -- in other ones.
通过计算机分析对46名健康受试者和100多名患有不同意识障碍的患者进行脑电图研究表明，对外界刺激做出反应以及进行高级神经活动的必要条件之一是维持脑电过程的最佳相干水平，这与最佳皮质张力相对应。不同深度的障碍显示出与最佳水平的不同相干偏差：深度障碍（昏迷）时其总体下降，昏睡时低频范围内急剧（最差）上升，而在正常状态下的嗜睡中则在很宽的频率范围内上升。昏迷后阶段和昏迷早期意识的恢复伴随着脑电图相干水平之间的不一致——一些皮质区域下降而另一些区域急剧上升。
