MSH: Psychiatric illness or diseases manifested by breakdowns in the adaptational process expressed primarily as abnormalities of thought, feeling, and behavior producing either distress or impairment of function.,CSP: any of various conditions characterized by impairment of an individual's normal cognitive, emotional, or behavioral functioning, and caused by social, psychological, biochemical, genetic, or other factors, such as infection or head trauma; note behavior disorders are a subset of mental disorder.,NCI: Any deviation from the normal structure or function of the brain and a psychiatric condition, that results in an impairment of an individual's normal cognitive, emotional, or behavioral functioning, and is caused by physiological or psychosocial factors. (NCI),MEDLINEPLUS: Mental disorders include a wide range of problems, including Anxiety disorders, including <a href='http://www.nlm.nih.gov/medlineplus/panicdisorder.html'