Decision Signals in the Local Field Potentials of Early and Mid-Level Macaque Visual Cortex

Aravind Krishna, Seiji Tanabe, Adam Kohn

Research output: Contribution to journalArticlepeer-review

Abstract

The neural basis of perceptual decision making has typically been studied using measurements of single neuron activity, though decisions are likely based on the activity of large neuronal ensembles. Local field potentials (LFPs) may, in some cases, serve as a useful proxy for population activity and thus be useful for understanding the neural basis of perceptual decision making. However, little is known about whether LFPs in sensory areas include decision-related signals. We therefore analyzed LFPs recorded using two 48-electrode arrays implanted in primary visual cortex (V1) and area V4 of macaque monkeys trained to perform a fine orientation discrimination task. We found significant choice information in low (0-30 Hz) and higher (70-500 Hz) frequency components of the LFP, but little information in gamma frequencies (30-70 Hz). Choice information was more robust in V4 than V1 and stronger in LFPs than in simultaneously measured spiking activity. LFP-based choice information included a global component, common across electrodes within an area. Our findings reveal the presence of robust choice-related signals in the LFPs recorded in V1 and V4 and suggest that LFPs may be a useful complement to spike-based analyses of decision making.

Original languageEnglish (US)
Pages (from-to)169-183
Number of pages15
JournalCerebral Cortex
Volume31
Issue number1
DOIs
StatePublished - Jan 1 2021

Keywords

  • beta
  • choice analysis
  • gamma
  • perceptual decision making
  • visual discrimination

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Cellular and Molecular Neuroscience

Fingerprint

Dive into the research topics of 'Decision Signals in the Local Field Potentials of Early and Mid-Level Macaque Visual Cortex'. Together they form a unique fingerprint.

Cite this