This paper introduces a broken power-law model to describe heart rate variability spectra in sleep, finding age, sex, and sleep stages affect spectral characteristics.

Computers in Biology and Medicine · Jul 9, 2026Peer-reviewedPhysiology

Spectral features of heart rate variability in Williams syndrome during sleep

Bence Schneider, Ferenc Gombos, Ilona Kovács, Róbert Bódizs

This study analyzes HRV spectral features in Williams syndrome during sleep, finding altered fractal properties and associations with sleep structure indicators.

Journal of Clinical Medicine · Jun 3, 2026Peer-reviewedPhysiology

Fractal cycles of sleep: a new aperiodic activity-based definition of sleep cycles

Yevgenia Rosenblum, Mahdad Jafarzadeh Esfahani, Nico Adelhöfer, Paul Zerr, Melanie Furrer, Reto Huber, Famke F Roest, Axel Steiger, Marcel Zeising, Csenge G. Horváth, Bence Schneider, Róbert Bódizs, Martin Dresler

This paper introduces fractal cycles as a new definition of sleep cycles based on fractal neural activity, showing correlations with classical cycles and differences across age groups and depression states.

eLife · Jan 9, 2025Peer-reviewedNeuroscience

Scale-free and oscillatory spectral measures of sleep stages in humans

Bence Schneider, Orsolya Szalárdy, Péter P. Ujma, Péter Simor, Ferenc Gombos, Ilona Kovács, Martin Dresler, Róbert Bódizs

The paper analyzes sleep EEG spectra using the FOOOF method to separate aperiodic and oscillatory components, finding sleep stage-specific spectral features.

Frontiers in Neuroinformatics · Oct 3, 2022Peer-reviewedBioinformatics