My research focuses on sleep and cognition. I use a multidisciplinary approach, combining chronobiological protocols, fMRI, EEG, melatonin assessment, and cognitive testing to assess how circadian rhythmicity, sleep homeostasis, and their interaction affect brain responses. Our current project (http://www.cognap.uliege.be) aims to evaluate the impact of core physiological sleep-wake processes on cognitive fitness and brain integrity in the aged.