ИСТИНА

Objective: To provide evidence that TMS of the somatosensory cortex during different mental tasks elicits EEG changes in the sensorimotor cortex Methods: Repetitive TMS (rTMS) was applied to the somatosensory cortex and Cz point (control) of 8 healthy volunteers. Changes in spectral EEG characteristics over sensorimotor cortex were evaluated during the performance of: 1) motor imagery of fingers (MI), 2)counting of abstract elements of a picture (“visual scene”). EEG was recorded across C4 and C3 electrodes with 500 Hz sampling rate. Results: rTMS of the somatosensory cortex with a frequency of the individual peak value frequency of mu-rhythm increases spectral power and dynamic range of mu-rhythm in the motor cortex during the performance of “visual scene” task, but not during MI. rTMS with a frequency of 5Hz has no influence on EEG spectral characteristics in either task. Conclusions: The results provide evidence that effects of rTMS of somatosensory cortex may be recognized as feedback from the outside world to the internal processes. The prospects are discussed for a new generation of BCI with noninvasive feedback translating directly into the brain through TMS.