Variability and stability in sleeping brain networks during apnea Konstantin Sergeev, Maxim Zhuravlev, Anna Orlova, Margarita Simonyan, Anton Kiselev and Anastasiya Runnova Eur. Phys. J. Spec. Top., Publication ahead of print Published online: 25 July 2025 DOI: 10.1140/epjs/s11734-025-01793-8