What Is Psychophysiology?

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Definition

Insomnia is difficulty getting to sleep or staying asleep, or having nonrefreshing sleep for at least 1 month.


Alternative Names

Psychophysiological insomnia; Learned insomnia; Chronic insomnia; Primary insomnia


Causes, incidence, and risk factors

Primary insomnia refers to insomnia that is not caused by any known physical or mental condition.

Insomnia is caused by many different things. The most common causes of insomnia are:

  • Alcohol
  • Anxiety
  • Coffee
  • Stress

Secondary insomnia is caused by a...

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