Introductory notes to the NIBR 2004 presentation ================================================ SLIDE 1 (TITLE) I'm going to talk today about some of the results of the modeling method that I have been advancing with Mike Hasselmo at the Laboratory of Computational Neurophysiology at the Center for Memory and Brain. SLIDE 3 (OVERVIEW) In the first part of our work, we focused on determining the importance and function of brain rhythms, specifically the prominent theta rhythm. Then, we improved the system architecture to model how a more complete set of brain regions are involved in task specific deficiencies due to lesions. In that, we focused on the importance of converging paths of activity within prefrontal cortex and on properties of prefrontal network neuroanatomy that support learning of goal-directed behavior. And most recently, we applied our prefrontal model to a replication and explanation of results by Schultz et al. in a primate visual discimination task that was based on well known experiments by Thorpe et al. As it happens, our conclusions in that task will be submitted for publication a few days from now. The results provide an explanation for very selective activity recorded at individual neurons. Reminder to mention: ADP is caused by calcium sensitive cation currents that are induced by muscarinic receptor activation (Klink and Alonso, 1997).