Based on the hypothesis that the disturbance of the perception of inner speech and its subjective alienation is the basis of verbal hallucinations in schizophrenia, we study the process of generating inner speech in normal conditions and in mental pathology and its electrophysiological markers. In the control group, the maximum values of absolute amplitudes of the theta range for the difference between resting state and inner speech task are observed in the central and frontal zones. Temporal areas show the lowest values. In general, the distribution of amplitudes in healthy people is relatively uniform, with an increase closer to the central line of the head and a decrease on the periphery. In the target group, maximum amplitudes are also observed in the central and parietal zones. Temporal areas have minimal values, much lower than the others. In general, the distribution of amplitudes in patients is less uniform. Our data on the localization of structures using the virtual implanted electrode method, supported by coherence data, indicate an increase in the connection between the right homotope of the speech production zone and the ipsilateral hippocampus and amygdala, as well as a greater involvement of the associative visual areas of the right hemisphere in the process of inner speech in patients with schizophrenia than in the control group. A large area of the prefrontal cortex of the right hemisphere in patients is also higher in terms of the strength of the connection with the putamen area in patients than in healthy people. Weakening of connections in patients compared to the target group is also noted mainly in the right hemisphere. The greatest disconnection was obtained between the structures of the caudate nucleus and the prefrontal cortex of the left and right hemispheres.