Frontiers in Neuroscience

Frontiers in Neuroscience, section on Sleep and Circadian Rhythms All animals sleep. Yet, the underlying principles of why we sleep are still unknown. What constitute arousal states? Defining arousal and brain states in neurobiological terms is significant, as changes in arousal are at the core of most neuropsychiatric disorders. The new section of Frontiers aims to increase our understanding of the neuronal underpinnings of sleep and circadian rhythms, two converging biological processes essential for neuronal stability