ABSTRACT
The study analyzed ERPs in 37 healthy right handed subjects without neurological and psychiatric disorders. Young age group consisted of 18 persons aged 18 to 27; advanced age group included 19 persons aged 32 to 59. ERPs were recorded by 32 scalp electrodes according to 10-20% system. Two toned addball paradigm including standard and target tones was used for ERP-recording. The sound sequence was given to examinees without any preliminary instruction. Complex psychology testing included Stroop color and word test for the attention and interference assessment, and Wisconsin card sorting test. Significantly larger amplitude of N200 was detected in young persons in comparison to ones of advantage age. Wavelet-analysis revealed stronger wavelet-connections in frontal-central area on the time range of P300 in persons of advanced age vs. younger ones. The correlation of data of psychological tests examining executive functions was detected with latency of P300 in young examinees and with amplitude of P300 in advanced age ones. Obtained data suggests that switching from one activity to another is prevalence in young persons and focusing on a current activity in advanced age persons.
