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Subliminal perception refers to the processing of sensory information that occurs below the level of conscious awareness. Researchers study subliminal perception by presenting a stimulus, such as a word or image, very quickly, typically around 50 milliseconds. This rapid presentation is often followed by another stimulus, such as a pattern of dots or lines, which blocks further mental processing of the initial stimulus. As a result, if participants cannot identify the initial stimulus better...
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Countermanding Perceptual Decision-Making.

Paul G Middlebrooks1, Bram B Zandbelt1, Gordon D Logan1

  • 1Center for Integrative & Cognitive Neuroscience, Vanderbilt Vision Research Center, Department of Psychology, Vanderbilt University, Nashville, TN, USA.

Iscience
|January 21, 2020
PubMed
Summary
This summary is machine-generated.

This study shows that the brain can handle decision-making and action control simultaneously. Specific neurons in the prefrontal cortex manage both processes, unifying them into a single mechanism for flexible behavior.

Keywords:
Behavioral NeuroscienceBiological SciencesCognitive NeuroscienceNeuroscienceSensory Neuroscience

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • Perceptual decision-making and response control are typically viewed as separate cognitive functions.
  • Understanding the neural basis of concurrent cognitive tasks is crucial for explaining flexible behavior.

Purpose of the Study:

  • To investigate if perceptual decision-making and response control can occur concurrently.
  • To determine if the same neurons are involved in evidence accumulation and response inhibition.
  • To computationally unify perceptual decision-making and countermanding.

Main Methods:

  • Neural recordings from the prefrontal cortex of macaque monkeys.
  • Behavioral experiments measuring decision-making and response control.
  • Development of a computational model to simulate neural activity and behavior.

Main Results:

  • Perceptual decisions of varying difficulty can be efficiently countermanded.
  • Single prefrontal neurons were found to integrate evidence accumulation and response control.
  • A computational model of an interactive race between GO and STOP accumulators accurately predicted behavior and neural data.

Conclusions:

  • Perceptual decision-making and response control are not distinct but are part of a unified neuro-computational mechanism.
  • This unified mechanism supports flexible, adaptive behavior.
  • Prefrontal cortex plays a key role in integrating these cognitive functions.