Sleeplessness and Circadian Rhythm Disorder Topic Guide
Sleeplessness and Circadian Rhythm Disorder: A person's circadian rhythm is an internal biological clock that regulates a variety of biological processes according to an approximate 24-hour period. Most of a person's body systems demonstrate circadian ...
Primary Insomnia Primary insomnia is sleeplessness that cannot be attributed to a medical, psychiatric, or environmental cause (such as drug abuse or medications). Treatment may include lifestyle changes, therapy, medication, or a combination of these.