Sleep is divided into two major phases - rapid-eye-movement (REM) and non–rapid-eye-movement (NREM) sleep.
- The two‐process model of sleep regulation
- sleep efficiency - the ratio between the time a person spends asleep, and the total time dedicated to sleep
- sleep stages
- sleep hygiene
- napping
- sleep procrastination
Sleep Disorders
- insomnia
- obstructive sleep apnoea
- restless legs syndrome
- bruxism - which involves teeth grinding and clenching during sleep
- circadian rhythm sleep disorders