Arousal states are processes that include waking, deep sleep, and the dreaming phase of sleep (REM). Molecular Regulation of Arousal States explores the cellular and molecular mechanisms by which sleep and wakefulness are regulated and seeks explanations for the generation of arousal states. It presents step-by-step research protocols that allow investigators to apply the techniques described to a wide range of physiological and behavioral research problems, such as sleep neurobiology and state-dependent disruption of cardiopulmonary control. For the first time, a single source integrates cellular and molecular research techniques with studies of arousal, opening the door to exciting new research methodologies.