Psychiatric diseases

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Psychiatric diseases
Mental illnesses affect the very fabric of human nature, robbing it of its various facets of personality, purposeful behaviour, abstract thinking, creativity, emotion, and mood.Those suffering from mental disorders exhibit a spectrum of symptoms depending on the severity of their disease. These diseases include obsessive-compulsive personality disorder, dementia,schizophrenia, major depression, and manic disorders.
Pathological disturbances of mood, ranging from severe depression to manic behaviour, are common forms of mental illnesses. Severe depression ischaracterized by despondency, diminished interest in most or all activities, weight fluctuation not due to dieting, disruption in sleep patterns, psychomotor agitation or retardation, feelings of worthlessness,excessive quiet, and recurrent thoughts of death or suicide. Manic behaviour involves a period in which an expansive, elevated, or irritable mood persists abnormally. During this episode symptomssuch as increased talkativeness, distractibility, decreased need for sleep, inflated self-esteem, and excessive involvement in pleasurable yet risky activities may be present. The neurochemicalalterations in mania are less clearly understood, but it is well established that drugs effective in the treatment of mania are those that antagonize dopamine and serotonin. The mechanism responsible for thetherapeutic efficacy of lithium for the treatment of mania is not yet clear. Although mood disorders have a familial background, the evidence for a genetic component is not convincing.of its variousfacets of personality, purposeful behaviour, abstract thinking, creativity, emotion, and mood. Those suffering from mental disorders exhibit a spectrum of symptoms depending on the severity of theirdisease. These diseases include obsessive-compulsive personality disorder, dementia, schizophrenia, major depression, and manic disorders.
"human disease." Encyclopædia Britannica. Encyclopædia...
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