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Related Experiment Video

Updated: May 21, 2026

Infant Auditory Processing and Event-related Brain Oscillations

Infant Auditory Processing and Event-related Brain Oscillations

Published on: July 1, 2015

Brain oscillatory complexity across the life span.

Alberto Fernández¹, Pilar Zuluaga, Daniel Abásolo

¹Departamento de Psiquiatría y Psicología Médica, Universidad Complutense de Madrid, Madrid, Spain. aferlucas@med.ucm.es

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology

|June 1, 2012

Summary

This summary is machine-generated.

Brain oscillatory complexity, measured by Lempel-Ziv complexity (LZC), follows a distinct life-span trajectory, peaking in mid-adulthood and differing between genders. This provides a normative baseline for understanding brain health.

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Microstate and Omega Complexity Analyses of the Resting-state Electroencephalography

Microstate and Omega Complexity Analyses of the Resting-state Electroencephalography

Published on: June 15, 2018

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Infant Auditory Processing and Event-related Brain Oscillations

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Published on: July 1, 2015

Microstate and Omega Complexity Analyses of the Resting-state Electroencephalography

Microstate and Omega Complexity Analyses of the Resting-state Electroencephalography

Published on: June 15, 2018

Area of Science:

Neuroscience
Brain Oscillations
Complexity Analysis

Background:

Complexity estimates are increasingly used in neuropsychiatric research.
A normative understanding of brain oscillatory complexity across the lifespan is lacking.

Purpose of the Study:

To establish normative data for brain oscillatory complexity (Lempel-Ziv complexity - LZC) across the human lifespan.
To investigate the influence of age and gender on resting-state magnetoencephalogram (MEG) complexity.

Main Methods:

Analyzed resting-state MEG data from 222 healthy participants (ages 7-84).
Quantified brain oscillatory complexity using the Lempel-Ziv complexity (LZC) algorithm.
Examined age and gender effects on LZC values.

Main Results:

A significant quadratic relationship was observed between age and LZC, with complexity peaking in the sixth decade.
LZC values gradually declined after this peak into senescence.
Females demonstrated higher LZC values than males, particularly in anterior, central, and posterior brain regions.

Conclusions:

Brain oscillatory complexity exhibits a 'normal' physiological rhythm across the lifespan.
These findings offer a dynamical perspective for interpreting clinical studies using complexity estimates.
Deviations from this normative pattern may indicate pathological alterations in brain function.