Abstract
Objective To investigate the spatiotemporal pattern of event-related potentials(ERPs)induced by color-location binding task and semantics-location binding task in retrieval phase of working memory.Methods The ERPs of 19 channels were recorded from 13 healthy subjects while performing two binding delayedmatch-to-sample tasks.A paired t-test was adopted and the result of ERPs analysis was presented in the form of statistical parametric mapping(SPM)of t-values.Results Behavioral performances showed that in color-binding task the reaction time was significant shorter than that in semantics-binding task(P＜0.01),but the correct rate in color-binding task was better than that in semantics-bingding task(P＜0.05).The SPM of ERPs suggested significant effects occur in left lateral frontal in early stage and bilateral hemispheres later.Conclusion Retrieval information of semantics-location binding needs more resources of working memory than that of color-location binding. Key words: Working memory; Delayed-match-to-sample task; Event-related potentials(ERPs); Binding
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