Circadian Rhythm Sleep Disorders are disruptions in the circadian rhythm?"the human body’s internal clock, which regulates various biological processes...


If you experience difficulty falling asleep, staying asleep, or enjoying a restful night's sleep, you may be suffering from insomnia. Insomnia is defined as the perception or complaint of inadequate or poor-quality sleep because of one or more of the following: Difficulty falling asleep Waking up frequently during the night with difficulty returning to sleep Waking up too early in the morning Non-refreshing sleep Insomnia is a common symptom in the US...


Narcolepsy is a chronic, neurological sleep disorder with no known cause. It involves the body's central nervous system. Narcolepsy is a genetic disorder, and is caused by a deficiency in the production of a neuropeptide (known as hypocretin or orexin) by a part of the brain called the hypothalamus...


Obstructive sleep apnea is a common disorder that can be very serious. It is the cessation of breathing that occurs during sleep. Usually, it is due to physical airway obstruction by the tissues surrounding and in the airway at some point between the nostrils and the larynx (voice box)...


Parasomnias are sleep disorders that involve a range of behaviors that occur during sleep. These include sleepwalking, sleep talking, enuresis (bed-wetting), and sleep terrors, which are non-rapid eye movement (NREM) sleep disorders that occur early in the night...


Restless legs syndrome is a sleep disorder in which a person experiences unpleasant sensations in the legs, which are described as: Creeping Crawling Tingling Pulling Painful These sensations usually occur in the calf area, but may be felt anywhere from the thigh to the ankle...


Sleep apnea is a breathing disorder characterized by brief interruptions of breathing during sleep. Learn more at the New York Head and Neck Institute.


Snoring is the sound that occurs during sleep when flow of air is obstructed in the area where the tongue and upper throat meet the soft palate and uvula...