sleep deprivation
Sleep: We all do it, we all need it. An individual who lives to be 75 will have slept an estimated 22 to 23 years of that time (more than 200,000 hours). [Source: Encyclopedia of Human Development; Sleep]
psychophysiology
physical activity and inactivity
chronic disease, disease prevention, and lifestyle behaviors
physical status
behavioral medicine
neurological processes
physical and biological development
sleep stages
twilight sleep
dreams
sleep
concepts