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The Journal of Neuroscience, July 11, 2007, 27(28):7482-7489; doi:10.1523/JNEUROSCI.4718-06.2007
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Behavioral/Systems/Cognitive
Impact of Commitment on Performance Evaluation in the Rostral Cingulate Motor Area
Thomas Michelet, Bernard Bioulac, Dominique Guehl, Ludovic Escola, andPierre Burbaud Laboratoire de Physiologie et Physiopathologie de la Signalisation Cellulaire, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5543, Université Victor Segalen Bordeaux2, 33076 Bordeaux, France
Correspondence should be addressed to Thomas Michelet, Université de Montréal, Département de Physiologie, Pavillon Paul-G.-Desmarais, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal, Quebec, Canada H3C 3J7. Email: thomas.michelet{at}umontreal.ca
Performance evaluation is a prerequisite for behavioral adaptation. Although the anterior cingulate cortex (ACC) is thought to play a central role in error detection, little is known about the electrophysiological activity of this structure during the performance-monitoring process. We directly addressed this issue by training monkeys to perform a Stroop-like task and then recorded neuronal activity in the rostral cingulate motor area (CMAr), a relatively unexplored region of the ACC known to be involved in motor processing. We found that most CMAr neurons responded during the evaluation period to both positive and negative feedback, but neuronal changes were more important after an error than after a successful trial. Interestingly, this performance-monitoring activity was not directly modulated by the degree of difficulty of the cognitive situation because changes in discharge frequency were similar whatever the level of attentional control imposed on the monkey. Firing activity during the evaluation period increased more, however, in erroneously completed than in incompleted trials and when the reward was delivered in an active rather than passive context, indicating that performance evaluation was conditioned by the degree of commitment of the animal to the task. It would thus seem that CMAr neurons could constitute a system for the evaluation of behavioral performance contingent on the subject's commitment to the task.
Key words: anterior cingulate cortex; performance monitoring; single-unit recording; monkey; error detection; cingulate motor area
Received Oct. 30, 2006; revised May 28, 2007; accepted May 31, 2007.
Correspondence should be addressed to Thomas Michelet, Université de Montréal, Département de Physiologie, Pavillon Paul-G.-Desmarais, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal, Quebec, Canada H3C 3J7. Email: thomas.michelet{at}umontreal.ca
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