Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Ultradian rhythms in the EEG and task performance.

S Meneses Ortega1, M Corsi Cabrera

  • 1Departamentos de Psicofisiología y Psicología General Experimental, Facultad de Psicología, Universidad Nacional Autónoma de México, D.F.

Chronobiologia
|July 1, 1990
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same journal

Models for chronobiologic risk and prepathology detection. A tribute to Bill W. Kennedy.

Chronobiologia·1994
Same journal

Dora K. (Holly) Hayes.

Chronobiologia·1994
Same journal

Agostino Carandente.

Chronobiologia·1994
Same journal

In defense of proper cosinor analysis.

Chronobiologia·1994
Same journal

"Cancer marker chronomes" assessed in the light of chronobioethics.

Chronobiologia·1994
Same journal

Cardiovascular disease risk monitoring in the light of chronobioethics.

Chronobiologia·1994
See all related articles

This study explored ultradian rhythms in brain activity and cognitive performance. While electroencephalographic (EEG) signals and body temperature exhibited ultradian rhythms, cognitive task performance did not show significant patterns.

Area of Science:

  • Neuroscience
  • Chronobiology
  • Cognitive Science

Background:

  • Ultradian rhythms, biological cycles shorter than 24 hours, influence physiological and cognitive functions.
  • Understanding these rhythms is crucial for optimizing performance and well-being.
  • Previous research has identified ultradian rhythms in various physiological processes, but their impact on cognitive tasks requires further investigation.

Purpose of the Study:

  • To investigate the presence of ultradian rhythms in electroencephalographic (EEG) activation levels.
  • To examine ultradian rhythms in interhemispheric correlation.
  • To assess ultradian rhythms in cognitive task performance and their correlation with physiological variables.

Main Methods:

  • Eight healthy young adults (20-30 years) underwent two experimental sessions (08:00-14:00 and 14:00-20:00).

Related Experiment Videos

  • EEG activity was recorded every 15 minutes at rest with eyes open.
  • Cognitive tasks assessing logico-analytical (left hemisphere) and spatial (right hemisphere) functions were performed. Body and environmental temperatures were monitored.
  • Fourier analysis was applied to detect ultradian rhythms.

    • Main Results:

    • EEG variables demonstrated significant ultradian rhythmicity, particularly with slow oscillation periods of 3 and 6 hours.
    • Ultradian rhythms with a 3-hour period were observed in body temperature.
    • Cognitive task performance did not exhibit significant rhythmic patterns during the experimental sessions.
    • No significant correlations were found between the measured physiological variables and task performance.

    Conclusions:

    • The study confirms the presence of ultradian rhythms in electroencephalographic activation and body temperature in healthy young adults.
    • Cognitive task performance appears less susceptible to ultradian fluctuations within the tested timeframe.
    • Further research is needed to elucidate the complex interplay between physiological ultradian rhythms and cognitive functions.