ESTIMATION OF THE EEG ALPHA RHYTHM GENERATION SOURCES WHEN OBSERVING, EXECUTING AND IMITATING INSTRUMENTAL MOVEMENTS IN ADULT SUBJECTS WITH DIFFERENT IQ LEVELS
The EEG alpha rhythm (8–12 Hz) sources have been localized by means of the sLORETA method in 62 adult subjects having different IQ levels (average, higher than average and high) when they were observing, executing and imitating circular right hand movements with a computer mouse. Subjects with different IQ levels also differed significantly in their cortex activation patterns when executing and imitating movements. A more pronounced and focused activation of neocortex structures was registered in the high IQ adult subjects. The cortex activation differences were mostly found in the right hemisphere brain regions assumingly associated with the processes of visual-motor coordination and action attribution. A larger involvement of the left hemisphere precentral, girdle and postcentral gyri when executing the task of the real-time imitation of hand movements in the high IQ subjects may be an indicator of a greater activation of their mirror neuron system.