We studied the EEG power spectra of symmetrical cortical areas of the brain, 25 students in a state of quiet wakefulness with closed and open eyes and in solving modified "corrective test" three levels of difficulty. It was analyzed EEG spectral power features jт the symmetric cortical areas by calculating the Mann-Whitney test for groups of students with indicators of total productivity of attention above and below the average for the sample.
In the resting state EEG power differences between groups of students with high and low productivity of attention were observed in the low-frequency delta and theta EEG bands, whose power was higher in students with high productivity of attention compared to students with low values of these parameters.
In the process of testing the differences in EEG power spectra of students with high and low productivity of voluntary attention observed in the majority of the investigated cortical areas at high and medium complexity of the test and were minimal at its low complexity. With an average level complexity of the test a scale of the activation of the front and rear attention systems estimated on capacity of beta 2-activity of EEG in the left hemisphere was higher among all students, indicating a unilateral left hemisphere dominance of activation processes in the brain associated with the processing of sensory information.
With a high level of complexity of the task activation of rear attention system in the left hemisphere of the brain was higher among students with high rates of its productivity, and the front attention system – among the students with low productivity of attention, indicating that reciprocal nature of the interaction between the front and rear systems attention during complex cognitive activity.
Level of EEG spectral power in the delta and theta EEG frequency bands during proof-testing solutions in most studied areas of the cortex was higher among students with high productivity their voluntary attention compared to their peers with low productivity, that indicates the existence of variation in levels of activity systems that control the distribution of resources focus of these students.