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Exploring the maximum duration of the contingent negative variation.

Jonas Röhricht1, Han-Gue Jo2, Marc Wittmann3

  • 1Department of Psychosomatic Medicine and Psychotherapy, Medical Faculty, Medical Center - University of Freiburg, Freiburg, Germany.

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology
|April 1, 2018
PubMed
Summary

Researchers explored the maximum duration for maintaining cortical negativity using the contingent negative variation (CNV) task. Findings suggest that the late CNV component can be elicited up to 7.5 seconds, but not reliably at 10 seconds.

Keywords:
Contingent negative variationCurrent source densityEvent-related potentialReaction timeSlow cortical potential

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Electrophysiology

Background:

  • The contingent negative variation (CNV) is a well-studied electrophysiological measure of cortical activity.
  • Previous research has not systematically investigated the maximum duration for sustaining the late CNV (lCNV) component.

Purpose of the Study:

  • To determine the upper temporal boundary for eliciting the lCNV component.
  • To investigate the relationship between reaction time and lCNV amplitude across different inter-stimulus intervals (ISIs).

Main Methods:

  • Utilized the S1-S2 paradigm with ISIs of 2.5, 5, 7.5, and 10 seconds.
  • Employed electroencephalography (EEG) with linked mastoids reference and current source density (CSD) analysis.
  • Analyzed mean lCNV amplitude in relation to reaction time (RT) for 'fast' and 'slow' RT trials.

Main Results:

  • Mean lCNV amplitude was significantly higher for fast RT trials when CSD data was analyzed.
  • This RT effect was most pronounced in the 10-second ISI condition.
  • A lack of lCNV component and cortical negativity was observed prior to S2 in the 10-second condition.

Conclusions:

  • The findings suggest that intervals between 7.5 and 10 seconds represent the upper limit for eliciting the lCNV component.
  • Sustained cortical negativity, as measured by lCNV, may be limited in duration.
  • Reaction time is influenced by the ability to maintain cortical negativity over longer intervals.