Mental or Behavioral Dysfunction
behavior disorder
be·hav·ior dis·or·der
Definitions related to behavior disorders:
  • Any of various conditions characterized by impairment of an individual's normal behavioral functioning, and caused by social, psychological, biochemical, genetic, or other factors, such as infection or head trauma.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • (behavioral disorder) A specific behavioral problem that occurs in persistent patterns and characteristic clusters and that causes clinically significant impairment.
    NCI
    U.S. National Cancer Institute, 2021
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