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Related Experiment Videos

Vagal influence on working memory and attention.

Anita Lill Hansen1, Bjørn Helge Johnsen, Julian F Thayer

  • 1University of Bergen, Department of Psychosocial Sciences, Christiesgt 12, 5015 Bergen, Norway. anitalill5@yahoo.com

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology
|June 12, 2003
PubMed
Summary

Individuals with higher heart rate variability (HRV) demonstrated superior performance on executive function tasks, including working memory and sustained attention. This suggests a link between vagal tone and cognitive abilities.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychophysiology

Background:

  • Vagal tone, indicated by heart rate variability (HRV), is associated with physiological regulation.
  • Cognitive tasks, particularly those involving executive functions, place demands on cognitive resources and physiological systems.

Purpose of the Study:

  • To examine the relationship between vagal tone and performance on executive (working memory, sustained attention) and non-executive tasks.
  • To investigate cognitive task-induced reactivity in heart rate (HR) and HRV.

Main Methods:

  • Fifty-three male sailors underwent baseline HRV recording, followed by randomized working memory and continuous performance tests.
  • Participants were divided into high and low HRV groups based on baseline HRV.
  • Heart rate and inter-beat intervals were monitored throughout the experiment.

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Main Results:

  • The high HRV group exhibited significantly better performance on the working memory test compared to the low HRV group.
  • On the continuous performance test, the high HRV group showed faster reaction times, more correct responses, and fewer errors, particularly on executive function-related components.
  • Both groups displayed decreased HRV and increased HR during cognitive tasks, indicating physiological reactivity.

Conclusions:

  • Higher vagal tone, reflected by higher baseline HRV, is associated with enhanced performance on executive function tasks.
  • Cognitive load during tasks induces significant physiological changes in heart rate and HRV, irrespective of baseline vagal tone.