Related Experiment Video
Updated: Feb 1, 2026

Microstate and Omega Complexity Analyses of the Resting-state Electroencephalography
Published on: June 15, 2018
Dimensional Complexity of the Resting Brain in Healthy Aging, Using a Normalized MPSE
Norman Scheel1,2,3, Eric Franke1, Thomas F Münte2
1Institute for Neuro- and Bioinformatics, Universität zu Lübeck, Lübeck, Germany.
This study introduces normalized Multivariate Principal Subspace Entropy (nMPSE) to analyze brain activity complexity using functional MRI. The new method reveals age-related changes in brain regions, offering potential for biomarker discovery.
Area of Science:
- Neuroscience
- Functional Neuroimaging
- Complexity Science
Background:
- Resting-state functional connectivity complexity is challenging to quantify.
- Dimensional complexity measures like Omega (Ω) entropy work well for EEG but need adaptation for fMRI.
- Fast multiband fMRI now enables the temporal resolution required for advanced analysis.
Purpose of the Study:
- To introduce and evaluate a novel dimensional complexity measure, normalized Multivariate Principal Subspace Entropy (nMPSE), for functional MRI (fMRI) data.
- To investigate the effects of healthy aging on brain activity complexity using fMRI.
- To explore the utility of nMPSE in identifying age-related changes in specific brain regions and networks.
Main Methods:
- Developed normalized Multivariate Principal Subspace Entropy (nMPSE) by combining Eigenspectrum normalization and Multivariate Principal Subspace Entropy.
- Applied nMPSE to a large, open-access dataset of high-quality, fast multiband fMRI recordings.
- Utilized whole-brain, regional, network, and searchlight analyses to assess brain complexity.
Main Results:
- Identified significant age-related changes in brain activity complexity across various brain regions.
- Observed specific changes in sensorimotor and right inferior frontal areas.
- Demonstrated nMPSE's ability to analyze complexity at different energy levels, independent of global variance.
Conclusions:
- Normalized Multivariate Principal Subspace Entropy (nMPSE) is a promising tool for analyzing fMRI data complexity.
- This approach reveals age-related alterations in brain functional complexity.
- nMPSE holds potential for understanding brain function and developing biomarkers from fMRI data.
More Related Videos
05:44Using Saccadometry with Deep Brain Stimulation to Study Normal and Pathological Brain Function
Published on: July 14, 2016
09:01A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance
Published on: May 7, 2014
Related Concept Videos
The Resting Membrane Potential
Resting Membrane Potential
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
Resting Potential Decay
At rest, the K+ is the main ion that moves across the membrane...
Pressure Variation in a Fluid at Rest
When measuring pressure at two different levels within the fluid, the difference in...
Normal Stress
When a rod is under axial loading, the internal forces and corresponding stress are normal to the plane of the section, so it is termed normal stress. It's important to...
Normal Distribution