Wikipedia: Sleep

Broad physiology and behavior article on sleep stages, homeostatic and circadian regulation, and health correlates—orientation for readers before diving into sleep-hygiene trials.

Clinical boundary

Insomnia and circadian disorders often need clinical assessment; this page is not a treatment manual.

Pair with this database

Use for vocabulary (NREM/REM, sleep pressure) then read PubMed-linked sources on sleep-optimization for measurable outcomes (sleep efficiency, PSQI, performance).

Outcomes

Sleep Efficiency
Tertiary article: no vetted intervention effect sizes; verify sleep metrics in linked systematic reviews and trials

View original paper →