Insomnia:  (in som nee ya)   [Latin in = not, plus somnus = sleep]  An inability to  gain sufficient restorative sleep. Insomnias are sleep disorders that somehow interfere with the ability to get enough sleep. People with insomnias can't fall asleep, can't stay asleep, or otherwise have poor quality sleep. Insomnias may be transient,  acute, or chronic. Without treatment, chronic insomnia often leads to ongoing sleep deprivation.

Click on the links below for more information about specific Insomnia disorders:

Psychophysiological Insomnia: (also known as Learned Insomnia) the inability to fall or stay asleep because of one's own behaviors. ...more

Restless Legs Syndrome (RLS):  unpleasant sensations in the legs or elsewhere that is only relieved by movement, and that movement, of course, keeps a body awake! ...more

Paradoxical Insomnia:  (also known as Sleep Misperception Syndrome) a feeling of severe insomnia or sleep loss despite getting adequate sleep. ...more

Idiopathic Insomnia:  lifelong insomnia that cannot be explained by any other factors, including another sleep disorder, a medical problem, or a life circumstance. ...more

Additional Insomnias: 
any of several less common insomnias, including: Inadequate Sleep Hygiene, Adjustment Insomnia, and Behavioral Insomnia of Childhood. ...more