第136回ＫＡＲＣコロキウムのご案内

開催日時	令和元年7月23日(火) 14:00 〜
開催場所	未来ICT研究所 第2研究棟 3F TV会議室2
講演	A normative perspective on diversities of dopamine neurons
講演者	Harvard University, USA 教授 内田直滋
講演概要	Midbrain dopamine neurons play important roles in learning, motivation and movements. It has long been thought that dopamine neurons broadcast a reward prediction error signal to drive learning to predict future outcomes. Recent studies have shown, however, that the signals sent by dopamine neurons are more diverse than previously thought. For instance, some dopamine neurons are activated by threatening stimuli but not by reward. The activity of some dopamine neurons may be correlated with movement kinematics (e.g. speed) or the distance to a reward location (or motivational value) but not with reward prediction errors. These results have been taken as evidence challenging the canonical view of dopamine signals based on reward prediction errors. In this talk, I will try to present a normative perspective on these diverse dopamine signals under the framework of reinforcement learning theory.
使用言語	日本語
参加費	無料
担当者	情報通信研究機構　未来ICT研究所 フロンティア創造総合研究室　記憶神経生物学プロジェクト　総括研究員　吉原 基二郎