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. Author manuscript; available in PMC: 2022 Dec 11.
Published in final edited form as: Am J Physiol Regul Integr Comp Physiol. 2008 Apr 16;294(6):R1980–R1987. doi: 10.1152/ajpregu.00925.2007

Fig. 1.

Fig. 1.

Global relative transition frequencies between awake (W), REM (R), and non-REM sleep (S) for healthy controls (black) and patients with chronic fatigue syndrome (CFS) (gray). **P < 0.01 from healthy controls.