Abstract summary 

Early, late and slow waves of event-related potentials (erps) appearing around 0-300 ms, 300-500 ms and after 500 ms respectively post-question presentation have been differentially associated to mental arithmetic processing (MAP). We hypothesized that arithmetic-operation effect (AOE) will show greater modulation of early components (P100, P200) in high-frequency erps; late components (P300, N300) and slow waves in low-frequency ERP when large-size problems are employed.Fourteen normal human subjects mentally processed large- and small-size addition, division, multiplication and subtraction problems. Spatiotemporal differences between these arithmetic-operations were studied by way of comparing amplitudes and latencies of early, late and slow waves.All components were modulated by AOE. Modulated was observed as early as 100 ms post-question presentation (in high-frequency ERP components). AOE was very pronounced in large-size problems (in low-frequency ERP components).Results suggest that modulation by AOE of ERP components is improved when large-size problems and low-frequency ERP components are employed. Thus, differentiation of neuropsychological processes manifested by amplitude and latency of ERP components may be best studied by first separating components into high- and low-frequency erps.Findings raise the potential of obtaining ERP indices that may improve findings about the degree (and time) of engagement of cognitive processes (e.g. Strategy employed in MAP).

Authors & Co-authors:  Muluh E T ET Vaughan C L CL John L R LR

Study Outcome 

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