Dynamics of prefrontal and cingulate activity during a reward-based logical deduction task. - Archive ouverte HAL
Article Dans Une Revue Cerebral Cortex Année : 2007

Dynamics of prefrontal and cingulate activity during a reward-based logical deduction task.

Résumé

We used behavioral and functional magnetic resonance imaging (fMRI) methods to probe the cerebral organization of a simple logical deduction process. Subjects were engaged in a motor trial-and-error learning task, in which they had to infer the identity of an unknown 4-key code. The design of the task allowed subjects to base their inferences not only on the feedback they received but also on the internal deductions that it afforded (autoevaluation). fMRI analysis revealed a large bilateral parietal, prefrontal, cingulate, and striatal network that activated suddenly during search periods and collapsed during ensuing periods of sequence repetition. Fine-grained analyses of the temporal dynamics of this search network indicated that it operates according to near-optimal rules that include 1) computation of the difference between expected and obtained rewards and 2) anticipatory deductions that predate the actual reception of positive reward. In summary, the dynamics of effortful mental deduction can be tracked with fMRI and relate to a distributed network engaging prefrontal cortex and its interconnected cortical and subcortical regions.

Domaines

Imagerie

Dates et versions

hal-00349660 , version 1 (03-01-2009)

Identifiants

Citer

Claire Landmann, Stanislas Dehaene, Sabina Pappata, Antoinette Jobert, Michel Bottlaender, et al.. Dynamics of prefrontal and cingulate activity during a reward-based logical deduction task.. Cerebral Cortex, 2007, 17 (4), pp.749-59. ⟨10.1093/cercor/bhk028⟩. ⟨hal-00349660⟩
197 Consultations
0 Téléchargements

Altmetric

Partager

More