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  Representation of perceptual evidence in the human brain assessed by fast, within-trial dynamic stimuli

Bitzer, S., Park, H., Maess, B., von Kriegstein, K., & Kiebel, S. J. (2020). Representation of perceptual evidence in the human brain assessed by fast, within-trial dynamic stimuli. Frontiers in Human Neuroscience, 14: 9. doi:10.3389/fnhum.2020.00009.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-C48F-D Version Permalink: http://hdl.handle.net/21.11116/0000-0005-C490-A
Genre: Journal Article

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 Creators:
Bitzer, Sebastian1, Author              
Park, Hame2, 3, Author
Maess, Burkhard4, Author              
von Kriegstein, Katharina1, 5, Author              
Kiebel, Stefan J.1, Author
Affiliations:
1Faculty of Psychology, TU Dresden, Germany, ou_persistent22              
2Department for Cognitive Neuroscience, Faculty of Biology, University of Bielefeld, Germany, ou_persistent22              
3Center of Excellence Cognitive Interaction Technology, University of Bielefeld, Germany, ou_persistent22              
4Methods and Development Group Brain Networks, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_2205650              
5Max Planck Research Group Neural Mechanisms of Human Communication, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634556              

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Free keywords: MEG (magnetoencephalography); Posterior cingulate cortex (PCC); Perceptual decision making; Decision evidence; Event-related regression; Within-trial fluctuations
 Abstract: In perceptual decision making the brain extracts and accumulates decision evidence from a stimulus over time and eventually makes a decision based on the accumulated evidence. Several characteristics of this process have been observed in human electrophysiological experiments, especially an average build-up of motor-related signals supposedly reflecting accumulated evidence, when averaged across trials. Another recently established approach to investigate the representation of decision evidence in brain signals is to correlate the within-trial fluctuations of decision evidence with the measured signals. We here report results of this approach for a two-alternative forced choice reaction time experiment measured using magnetoencephalography (MEG) recordings. Our results show: (1) that decision evidence is most strongly represented in the MEG signals in three consecutive phases and (2) that posterior cingulate cortex is involved most consistently, among all brain areas, in all three of the identified phases. As most previous work on perceptual decision making in the brain has focused on parietal and motor areas, our findings therefore suggest that the role of the posterior cingulate cortex in perceptual decision making may be currently underestimated.

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Language(s): eng - English
 Dates: 2019-09-062020-01-132020-02-04
 Publication Status: Published online
 Pages: -
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 Rev. Method: -
 Identifiers: DOI: 10.3389/fnhum.2020.00009
Other: eCollection 2020
PMID: 32116600
PMC: PMC7010639
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Title: Frontiers in Human Neuroscience
  Abbreviation : Front Hum Neurosci
Source Genre: Journal
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Publ. Info: Lausanne, Switzerland : Frontiers Research Foundation
Pages: - Volume / Issue: 14 Sequence Number: 9 Start / End Page: - Identifier: ISSN: 1662-5161
CoNE: https://pure.mpg.de/cone/journals/resource/1662-5161