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| Refers to the drilling of a hole in the skull, presumably as a way of treating psychological disorders during pr ehistoric times. |
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| Extreme or irrational fear of crowded spaces or enclosed public places. |
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| Intense or irrational dislike or fear of people from other countries. |
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| A relatively mild mental illness that is not caused by organic disease, involving symptoms of stress (depression, anxiety, obsessive behavior, hypochondria) but not a radical loss of touch with reality. Compare with psychosis. |
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| Anxiety that lacks a definite focus or content. |
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| Distressing episodes where an individual experiences palpitations, anxiety, apprehension, sweating, trembling, etc. Can last several minutes and recur unpredictably. |
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| Compulsive preoccupation with an idea or an unwanted feeling or emotion, often accompanied by symptoms of anxiety. |
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| Is the act of intentionally feigning or exaggerating physical or psychological symptoms for personal gain. |
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| Having an emotional or psychologic origin. |
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| A lithium salt used in the treatment of depression and mania associated with bipolar disorder. |
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| An abnormally elated mental state, typically characterized by feelings of euphoria, lack of inhibitions, racing thoughts, diminished need for sleep, talkativeness, risk taking, and irritability. |
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| A false belief strongly held in spite of invalidating evidence, especially as a symptom of mental illness. |
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| A sense perception (sight, touch, sound, smell, or taste) that has no basis in external stimulation. |
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| An overwhelming urge to perform an irrational act or ritual. |
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| A symptom or feature of mental illness typically characterized by radical changes in personality, impaired functioning, and a distorted or nonexistent sense of objective reality. |
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| A psychological theory that explains behavior as both a result of biological and genetic factors ("nature"), and life experiences ("nurture"). |
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| The cause, set of causes, or manner of causation of a disease or condition. |
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