Comment on “Single-trial spike trains in parietal cortex reveal discrete steps during decision-making”

Author:

Shadlen Michael N.1,Kiani Roozbeh2,Newsome William T.3,Gold Joshua I.4,Wolpert Daniel M.5,Zylberberg Ariel6,Ditterich Jochen7,de Lafuente Victor8,Yang Tianming9,Roitman Jamie10

Affiliation:

1. Howard Hughes Medical Institute (HHMI) and Department of Neuroscience, Columbia University, New York, NY, USA.

2. Center for Neural Science, New York University, New York, NY, USA.

3. HHMI and Stanford University, Stanford, CA, USA.

4. Department of Neuroscience, University of Pennsylvania, Philadelphia, PA, USA.

5. Department of Engineering, University of Cambridge, Cambridge, UK.

6. HHMI and Department of Neuroscience, Columbia University, New York, NY, USA.

7. Center for Neuroscience and Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA, USA.

8. Institute for Neuroscience, National Autonomous University of Mexico, Querétaro, México.

9. Institute of Neuroscience, Chinese Academy of Sciences, Shanghai, China.

10. Department of Psychology, University of Illinois at Chicago, Chicago, IL, USA.

Abstract

Latimer et al . (Reports, 10 July 2015, p. 184) claim that during perceptual decision formation, parietal neurons undergo one-time, discrete steps in firing rate instead of gradual changes that represent the accumulation of evidence. However, that conclusion rests on unsubstantiated assumptions about the time window of evidence accumulation, and their stepping model cannot explain existing data as effectively as evidence-accumulation models.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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