articleJournal of NeuroscienceJan 25, 2006GREEN OA

A Recurrent Network Mechanism of Time Integration in Perceptual Decisions

KWKongFatt Wong‐LinXWXiao‐Jing Wang

Brandeis University

PubMed
Indexed incrossrefpubmed

Abstract

Recent physiological studies using behaving monkeys revealed that, in a two-alternative forced-choice visual motion discrimination task, reaction time was correlated with ramping of spike activity of lateral intraparietal cortical neurons. The ramping activity appears to reflect temporal accumulation, on a timescale of hundreds of milliseconds, of sensory evidence before a decision is reached. To elucidate the cellular and circuit basis of such integration times, we developed and investigated a simplified two-variable version of a biophysically realistic cortical network model of decision making. In this model, slow time integration can be achieved robustly if excitatory reverberation is primarily mediated by…

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Keywords
  • Computer science
  • Attractor
  • Neuroscience
  • Task (project management)
  • Sensory system
  • Artificial intelligence
  • Psychology
  • Mathematics
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