A brain model of the relationship between semantic memory and working memory in semantic cognitive tasks

We have simulated the brain mechanisms involved in semantic processing tasks such as the differentiation of two sequential stimuli based upon recalled semantic features. In this paper we examine the relationship between perceptual inputs, working memory and semantic memory in these tasks. We propose that phase synchronous firing binds features in semantic memory with concepts in working memory, and that a phase comparison mechanism subserves the process of response selection. The model is consistent with the anatomy and physiology of the component brain circuits where known. This research is important because the relationship between working memory and long-term memory is a central component of many theories of cognition.