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Start Over Author "Rezaie, R" Publisher elsevier bv
6 results on '"Rezaie, R"'

6. Single-trial magnetoencephalography signals encoded as an unfolding decision process

Author

Dimitris Mylonas, Constantinos I. Siettos, Periklis Y. Ktonas, Ioannis Evdokimidis, Nikolaos Smyrnis, Errikos M. Ventouras, Roozbeh Rezaie, Andrew C. Papanicolaou, Smyrnis, N, Mylonas, D, Rezaie, R, Siettos, C, Ventouras, E, Ktonas, P, Evdokimidis, I, and Papanicolaou, A

Subjects
Adult, Male, medicine.diagnostic_test, Cognitive Neuroscience, Decision Making, Healthy subjects, Magnetoencephalography, Cognition, Young Adult, Motor reaction, medicine.anatomical_structure, Neurology, Cortex (anatomy), Reaction Time, medicine, Humans, Female, Decision process, Single trial, Psychology, Neuroscience, psychological phenomena and processes, Motor cortex
Abstract

article i nfo Article history: The model of a stochastic decision process unfolding in motor and premotor regions of the brain was encoded in single-trial magnetoencephalographic (MEG) recordings while ten healthy subjects performed a sensori- motor Reaction Time (RT) task. The duration of single-trial MEG signals preceding the motor response, recorded over the motor cortex contralateral to the responding hand, co-varied with RT across trials accord- ing to the model's prediction. Furthermore, these signals displayed the same properties of a "rising-to-a- fixed-threshold" decision process as posited by the model and observed in the activity of single neurons in the primate cortex. The present findings demonstrate that non-averaged, single-trial MEG recordings can be used to test models of cognitive processes, like decision-making, in humans.

Published
2012
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