What is the terminology related to sleep dysfunction?

Updated: Jan 31, 2019
  • Author: Gila Hertz, PhD, ABSM; Chief Editor: Selim R Benbadis, MD  more...
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Terminology relating to sleep dysfunction includes the following:

  • Insomnia - Difficulty with falling asleep or staying asleep

  • Sleep-onset insomnia - Difficulty with falling asleep

  • Sleep-maintenance insomnia - Fragmented sleep, difficulty with maintaining sleep

  • Circadian rhythm - Approximately 24-hour cycles that are generated endogenously by an organism

  • Sleep-disordered breathing (SDB) - Some degree of sleep-related upper airway obstruction, ranging in severity from upper airway resistance syndrome (UARS) to obstructive sleep apnea (OSA)

  • Restless legs syndrome (RLS) - Characterized by the urge to move legs or other limbs during periods of rest or inactivity

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