- Sleep-wake disorders are a category of disorders in which the amount, quality, timing, or behavior during sleep deviates from normal sleep patterns and can affect daily functioning.
- Related factors may include other physical illnesses, pain, mental health conditions, medications, genetic factors, caffeine/alcohol, irregular schedules, and in some cases, the cause remains unidentified.
- Sleep is a process of alternating between non-REM sleep and REM sleep; frequent sleep interruptions can lead to a deficiency in specific sleep stages, which can affect recovery, learning, memory, and daytime functioning.
- Representative patterns include insomnia (difficulty falling asleep or frequent awakenings), abnormal breathing during sleep, restless legs, excessive daytime sleepiness, circadian rhythm issues, and parasomnias.
- Individual risks and patterns may vary depending on age, health status, daily schedule, shift work or jet lag, comorbidities, and the use of drugs or substances.
- Symptoms vary depending on the type of disorder and may include persistent sleep onset delay, nocturnal awakenings, early awakening, daytime sleepiness, snoring/gasping, limb discomfort, or movements during sleep.
- Diagnosis is based on medical history, sleep history, and physical examination, and overnight polysomnography or daytime sleepiness/alertness assessments are performed as necessary.
- It is difficult to conclude a specific disorder based on sleep symptoms alone; the effects of sleep deprivation, medications/substances, depression/anxiety, pain, and other conditions must be interpreted together.
- Management is carried out by adjusting sleep habits and daily rhythms according to the type and cause of the disorder, checking for comorbidities and substance use, and, if necessary, combining behavioral therapy with device or drug treatments.
- Treatment is not a single standard method but varies depending on the cause and type; for example, CPAP may be used for sleep apnea, light therapy for some circadian issues, and cognitive behavioral therapy for insomnia.