neuroscientific importance of a good sleep. young beautiful woman sleeps blissfully in the bed. girl with regulated circadian

beautiful bed blissfully brain brazilian caucasian circadian clock closed cycle deprivation difficulty dreaming eye eyes girl good health importance insomnia latin mattress memory movement nap nervous neurobiological neuroscience neuroscientific night nocturnal nonrapid nonrem people pillow process processing psychiatrist psychologist quiet rapid regulated rem rest restoration rhythm sleep sleeping sleeps sleepwake smiling system teenager tired waves woman young