Small electronic device that is worn on the wrist like a watch and records body movements. This device can be used to record sleep–wake cycles.
Eating disorder characterized by recurrent food refusal, leading to dangerously low body weight.
Relatively brief episode of uncontrolled, excessive consumption, usually of food or alcohol.
Pattern of eating involving distress-inducing binges not followed by purging behaviors; being considered as a new DSM diagnostic category.
breathing-related sleep disorder
Sleep disruption leading to excessive sleepiness or insomnia, caused by a breathing problem such as interrupted (sleep apnea) or labored (hypoventilation) breathing.
Eating disorder involving recurrent episodes of uncontrolled excessive (binge) eating followed by compensatory actions to remove the food (for example, deliberate vomiting, laxative abuse, and excessive exercise).
circadian rhythm sleep disorder
Sleep disturbance resulting in sleepiness or insomnia, caused by the body’s inability to synchronize its sleep patterns with the current pattern of day and night.
Problem in getting to sleep or in obtaining sleep of sufficient quality.
Abnormally excessive sleep. A person with this condition falls asleep several times a day.
Short, seconds-long period of sleep that occurs when someone has been deprived of sleep.
Sleep disorder involving sudden and irresistible sleep attacks.
night eating syndrome
Consuming a third or more of daily food intake after the evening meal and getting out of bed at least once during the night to have a highcalorie snack. In the morning, individuals with night eating syndrome are not hungry and do not usually eat breakfast. These individuals do not binge during their night eating and seldom purge.
Frightening and anxietyprovoking dream occurring during rapid eye movement sleep. The individual recalls the bad dream and recovers alertness and orientation quickly.
Excess of body fat resulting in a body mass index (a ratio of weight to height) of 30 or more.
Abnormal behavior such as a nightmare or sleepwalking that occurs during sleep.
polysomnographic (PSG) evaluation
Assessment of sleep disorders in which a client sleeping in the lab is monitored for heart, muscle, respiration, brain wave, and other functions.
Difficulty in initiating, maintaining, or gaining from sleep; not related to other medical or psychological problems.
In the eating disorder bulimia nervosa, the self-induced vomiting or laxative abuse used to compensate for excessive food ingestion.
rapid eye movement (REM) sleep
Periodic intervals of sleep during which the eyes move rapidly from side to side, and dreams occur, but the body is inactive.
In a person with insomnia, the worsened sleep problems that can occur when medications are used to treat insomnia and then withdrawn.
Percentage of time actually spent sleeping of the total time spent in bed.
Episode of apparent awakening from sleep, accompanied by signs of panic and followed by disorientation and amnesia for the incident. Sleep terrors occur during nonrapid eye movement sleep and so do not involve frightening dreams.
Parasomnia that involves leaving the bed during nonrapid eye movement sleep. See also somnambulism.
Repeated sleepwalking that occurs during nonrapid eye movement sleep and so is not the acting out of a dream. The person is difficult to waken and does not recall the experience.