Spectral mapping reveals a resemblance of the anesthetic brain state to both sleep and coma - Janna D. Helfrich; Jerzy Szaflarski; Marianne C. J. Nævra; Luis Romunstad; Matthew P. Walker; Bryce A. Mander; Robert T. Knight; Pål G. Larsson; Randolph F. Helfrich (Proceedings of the National Academy of Sciences, 2026)