Jet Lag Disorder

Overview Jet lag disorder, a type of circadian rhythm sleep-wake disorder, involves a temporary mismatch between the body’s internal circadian clock and the external time cues of a new time zone, occurring after travel across at least two time zones. Signs and Symptoms Symptoms can include difficulty falling or staying asleep, excessive daytime sleepiness, reduced …

Sleep-Related Hypoventilation

Overview Sleep-related hypoventilation involves episodes of decreased breathing efficiency during sleep, leading to elevated carbon dioxide levels in the blood, which can occur independently or alongside other medical or lung conditions. Signs and Symptoms Symptoms can include morning headaches, excessive daytime sleepiness, and disrupted sleep, often related to an underlying lung, neuromuscular, or other medical …

Periodic Limb Movement Disorder

Overview Periodic limb movement disorder involves repetitive, involuntary limb movements, usually in the legs, occurring during sleep, that disrupt sleep quality or cause significant distress or impairment. Signs and Symptoms Symptoms can include unexplained daytime fatigue or sleepiness despite adequate time in bed, or a bed partner noticing repetitive kicking or jerking movements during sleep. …

Kleine-Levin Syndrome

Overview Kleine-Levin syndrome is a rare disorder involving recurrent episodes of excessive sleepiness lasting days to weeks, often accompanied by cognitive changes, altered perception, and behavioral disturbances, with normal sleep, mood, and behavior between episodes. Signs and Symptoms Symptoms during episodes can include sleeping up to 20 hours a day, confusion, irritability, and, in some …

Central Sleep Apnea

Overview Central sleep apnea involves repeated episodes of reduced or absent respiratory effort during sleep, without airway obstruction, often associated with underlying heart failure, stroke, or high-altitude exposure. Signs and Symptoms Symptoms can include pauses in breathing during sleep witnessed by others, disrupted sleep, and excessive daytime sleepiness, sometimes with less prominent snoring than obstructive …

Sleepwalking

Overview Sleepwalking, a type of non-REM sleep arousal disorder, involves repeated episodes of rising from bed and walking about during sleep, typically during the first third of the night, with limited responsiveness and little or no memory of the episode. Signs and Symptoms Symptoms can include walking, performing routine behaviors, or occasionally leaving the home …

Sleep Terrors

Overview Sleep terrors, a type of non-REM sleep arousal disorder, involve recurrent episodes of abrupt terror arousal from sleep, usually beginning with a panicked scream, accompanied by intense fear and signs of autonomic arousal, with little or no memory of the episode afterward. Signs and Symptoms Symptoms can include sudden screaming, sweating, rapid heartbeat, and …

REM Sleep Behavior Disorder

Overview REM sleep behavior disorder involves repeated episodes of arousal during REM sleep associated with vocalization or complex motor behaviors, often corresponding to dream content acted out due to loss of normal muscle paralysis during REM sleep. Signs and Symptoms Symptoms can include talking, shouting, punching, or kicking during sleep, sometimes resulting in injury to …

Nightmare Disorder

Overview Nightmare disorder involves repeated occurrences of extended, extremely dysphoric, and well-remembered dreams, usually involving threats to survival or safety, that cause clinically significant distress or impairment. Signs and Symptoms Symptoms can include waking fully alert from a disturbing dream, difficulty returning to sleep, and daytime fatigue or anxiety about sleeping. Experiencing one or more …

Obstructive Sleep Apnea

Overview Obstructive sleep apnea involves repeated episodes of partial or complete upper airway obstruction during sleep, leading to disrupted sleep, reduced oxygen levels, and excessive daytime sleepiness. Signs and Symptoms Symptoms can include loud snoring, witnessed pauses in breathing during sleep, gasping or choking during sleep, and excessive daytime fatigue. Experiencing one or more of …