Scientific article
Open access

Evidence accumulation relates to perceptual consciousness and monitoring

Published inNature Communications, vol. 12, no. 1, 3261
Publication date2021

A fundamental scientific question concerns the neural basis of perceptual consciousness and perceptual monitoring resulting from the processing of sensory events. Although recent studies identified neurons reflecting stimulus visibility, their functional role remains unknown. Here, we show that perceptual consciousness and monitoring involve evidence accumulation. We recorded single-neuron activity in a participant with a microelectrode in the posterior parietal cortex, while they detected vibrotactile stimuli around detection threshold and provided confidence estimates. We find that detected stimuli elicited neuronal responses resembling evidence accumulation during decision-making, irrespective of motor confounds or task demands. We generalize these findings in healthy volunteers using electroencephalography. Behavioral and neural responses are reproduced with a computational model considering a stimulus as detected if accumulated evidence reaches a bound, and confidence as the distance between maximal evidence and that bound. We conclude that gradual changes in neuronal dynamics during evidence accumulation relates to perceptual consciousness and perceptual monitoring in humans.

  • Adult
  • Animals
  • Consciousness/physiology
  • Decision Making
  • Drug Resistant Epilepsy/therapy
  • Electrodes
  • Implanted
  • Electroencephalography
  • Healthy Volunteers
  • Humans
  • Microelectrodes
  • Neurons/physiology
  • Parietal Lobe/cytology/physiology
  • Perception/physiology
  • Physical Stimulation/methods
  • Single-Cell Analysis
  • Young Adult
Citation (ISO format)
PEREIRA SALA, Michaël et al. Evidence accumulation relates to perceptual consciousness and monitoring. In: Nature Communications, 2021, vol. 12, n° 1, p. 3261. doi: 10.1038/s41467-021-23540-y
Main files (1)
Article (Published version)
Secondary files (1)
ISSN of the journal2041-1723

Technical informations

Creation08/17/2021 11:58:00 AM
First validation08/17/2021 11:58:00 AM
Update time03/16/2023 1:09:02 AM
Status update03/16/2023 1:09:01 AM
Last indexation10/19/2023 3:52:03 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack