AUTHOR=Leone Maria J., Petroni Agustin , Fernandez Slezak Diego F., Sigman Mariano TITLE=The tell-tale heart: heart rate fluctuations index objective and subjective events during a game of chess JOURNAL=Frontiers in Human Neuroscience VOLUME=6 YEAR=2012 URL=https://www.frontiersin.org/journals/human-neuroscience/articles/10.3389/fnhum.2012.00273 DOI=10.3389/fnhum.2012.00273 ISSN=1662-5161 ABSTRACT=

During a decision-making process, the body changes. These somatic changes have been related to specific cognitive events and also have been postulated to assist decision-making indexing possible outcomes of different options. We used chess to analyze heart rate (HR) modulations on specific cognitive events. In a chess game, players have a limited time-budget to make about 40 moves (decisions) that can be objectively evaluated and retrospectively assigned to specific subjectively perceived events, such as setting a goal and the process to reach a known goal. We show that HR signals events: it predicts the conception of a plan, the concrete analysis of variations or the likelihood to blunder by fluctuations before to the move, and it reflects reactions, such as a blunder made by the opponent, by fluctuations subsequent to the move. Our data demonstrate that even if HR constitutes a relatively broad marker integrating a myriad of physiological variables, its dynamic is rich enough to reveal relevant episodes of inner thought.