Sleep disorders that are characterized by abnormal behavioral or physical events during sleep are called:
a. Insomnia
b. Dyssomnias
c. Hypersomnia
d. Parasomnias
D
Sleep disorders characterized by abnormal behavioral or physical events during sleep are called parasomnias and are caused by inappropriate activation of certain centers of the brain that control physical and emotional functions. Insomnia is the inability to fall asleep; dyssomnias are sleep disorders characterized by abnormal amounts, quality, or timing of sleep; and hypersomnia is an abnormally increased amount of sleep.
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