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Diseases » Jet lag » Glossary

Glossary for Jet lag

  • Advanced sleep phase syndrome: ASPS is a condition in which patients feel very sleepy early in the evening (e.g. 18:00-19:00) and wake up very early in the morning (e.g. 03:00).
  • Chronic Fatigue Syndrome: Severe chronic fatigue disorder often following infection.
  • Delayed sleep-phase syndrome: Delayed sleep phase syndrome is a circadian rhythm sleep disorder, a chronic disorder of the timing of sleep, peak period of alertness, core body temperature, hormonal and other daily rhythms relative to societal norms.
  • Drowsiness: Excessive tiredness or sleepiness
  • Fatigue conditions: Medical conditions causing or characterized by fatigue (extreme tiredness or weakness).
  • Insomnia: Insomnia is defined as repeated difficulty with the initiation, duration, maintenance, or quality of sleep that occurs despite adequate time and opportunity for sleep that results in some form of daytime impairment.
  • Other conditions resulting from external causes: Medical conditions caused by some external event, such as in the environment.
  • Sleep deprivation: The condition of not getting enough sleep.
  • Sleep disorders: Any disorder that affects ones sleep
  • Sleep disturbance: Sleeping difficulty, called insomnia, can involve difficulty falling asleep when you first go to bed at night, waking up too early in the morning, and waking up often during the night.
  • Sleep symptoms: Symptoms affecting sleep patterns.
  • Tiredness: Feeling tired either physically or mentally


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