Dynamic processes and dissociation of Chinese characters and spatial information in working memory: An event-related potential study

In order to explore activation time-course and space domain of maintaining Chinese characters and spatial information in working memory, event-related potentials were measured when 14 normal adult participants (6 males, 8 females; ages 18-25) were performing delay-match tasks. During the delay interval, P250 was generated in bilateral frontal cortex. The latency of P250 elicited by Chinese characters in left PFC extended to 800ms, and the latency of P250 elicited by spatial locations in right PFC extended to 1000ms. N150 was elicited in bilateral parieto-occipital areas, which ended at 500ms and was followed by a sustained negative complex (SNC)