Sleep Disorders

Possible causes of excessive daytime drowsiness. See Wall Street Journal article "Scientists try to Unravel the Riddle of Too Much Sleep" on December 11, 2012.

• • Chronic sleep deprivation

  • Medical and mental illnesses

    • hormone and vitamin deficiencies

    • drug and alcohol use

    • medication side effects

    • etc.

  • Sleep disorders

    • obstructive sleep apnea

    • restless leg syndrome

    • sleep-phase problems

  • Narcolepsy

  • Kleine-Levin syndrome

  • idiopathic hypersomnia