Dumenko V N, Kozlov M K, Kurova N S, Cheremushkin E A
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia.
Neurosci Behav Physiol. 2010 Sep;40(7):783-91. doi: 10.1007/s11055-010-9327-z. Epub 2010 Jul 17.
Power spectra of cortical potentials at frequencies of 1-60 Hz were assessed in subjects in the state of resting with the eyes open, after listening to instructions, and during the prestimulus periods at the stages of forming and testing a cognitive set to a facial expression. Comparative assessment of power spectra in five frequency ranges (2-7, 8-13, 14-20, 21-40, and 41-60 Hz) showed significant decreases in the power of potentials in the 1-20 Hz frequency band in most subjects, along with a parallel increase in power in the 21-60 Hz band in all states, as compared with the resting state. Interregional differences in power were maximal in the 2-7 and 41-60 Hz bands and minimal in the 14-20 Hz band. In terms of power dynamics in the states being compared, intergroup differences were seen only at the test stage. Thus, a larger proportion of subjects with the plastic type of set had greater power in the gamma frequency range than was the case in subjects with the rigid type of set.
在受试者睁眼休息状态下、听取指令后以及在对面部表情形成和测试认知定势的阶段中刺激前期间，评估了频率在1 - 60赫兹的皮质电位功率谱。对五个频率范围（2 - 7、8 - 13、14 - 20、21 - 40和41 - 60赫兹）的功率谱进行比较评估显示，与休息状态相比，大多数受试者在1 - 20赫兹频段的电位功率显著降低，同时在所有状态下21 - 60赫兹频段的功率平行增加。功率的区域间差异在2 - 7和41 - 60赫兹频段最大，在14 - 20赫兹频段最小。就所比较状态下的功率动态而言，组间差异仅在测试阶段出现。因此，与具有刚性定势类型的受试者相比，具有可塑性定势类型的受试者在伽马频率范围内有更大比例的人具有更高的功率。
