AUTHOR=Davis Jeffery Jonathan Joshua , Kirk Ian J. , Kozma Robert 

TITLE=Two methodologies for brain signal analysis derived from Freeman Neurodynamics

JOURNAL=Frontiers in Systems Neuroscience

VOLUME=Volume 19 - 2025

YEAR=2025

URL=https://www.frontiersin.org/journals/systems-neuroscience/articles/10.3389/fnsys.2025.1570231

DOI=10.3389/fnsys.2025.1570231

ISSN=1662-5137

ABSTRACT=Here, Freeman Neurodynamics is explored to introduce the reader to the challenges of analyzing electrocorticogram or electroencephalogram signals to make sense of two things: (a) how the brain participates in the creation of knowledge and meaning and (b) how to differentiate between cognitive states or modalities in brain dynamics. The first (a) is addressed via a Hilbert transform-based methodology and the second (b) via a Fourier transform methodology. These methodologies, it seems to us, conform with the systems' neuroscience views, models, and signal analysis methods that Walter J. Freeman III used and left for us as his legacy.