Overview This kind of "dementia" are mostly associated with the emergence of consciousness temporary brain dysfunction, not a real smart defect, it is often sudden, but also suddenly disappeared, the general maintenance of shorter duration. The performance of intelligence serious defect extent as dementia, and mental retardation is inconsistent, as patients can not correctly answer the simple question, but rather complex problems can be the right answer. Multi-system trauma resulting from the strong. The mental retardation through appropriate treatment and processing, in the short term can be completely back to normal. Cause of pathology and pathogenesis 1. Hysterical pseudo-dementia: Hysteria and reactive mental disorders often seen this phenomenon. 2. Just Sayre syndrome: a common disorder in the detention and hysteria. 3. Child-like dementia: more common in hysteria. In fact, changes in clinical manifestations of consciousness rather than the real smart defect, usually in the spirit of factors suddenly, "dementia" may suddenly disappear. Smart defect seems particularly serious problem for a simple answer does not work, can understand the nature of the problem, but the answer ridiculous, deliberately contrived to give the impression of a variety of answers to questions often close to the right answer, but not exactly similar, and sometimes patients mental activity back to childhood, with a clear childish. Differential Diagnosis (A) in patients with hysteria hysteria may have pseudo dementia, dementia and ganser child-like syndrome, clinical features of the role of psychological factors in patients with sudden under similar state of dementia, memory loss, the answer wrong, even the daily life such as dressing the pants are full of mistakes, that gives the impression of intelligence serious harm, or the performance of speech and acts like a childish full of children, see the people you call "uncle," "Uncle," "aunt." Or performance of the approximation given in answer to a question to answer, such as "people with three legs", "2 +2 = 5" and the like, suggesting that patients know the correct answer, this short duration, the treatment or psychological factors after removal of the symptoms disappear soon. (B) reactive mental disorders was strong in the spirit immediately after stimulus on_set_, showing a clear awareness of obstacles and narrow, can not correctly perceive their surroundings, time, place or person that barriers orientation, comprehension difficulties, and often accompanied by a face confusion and lax attention, verbal messy, incoherent, making it difficult to understand the content of their psychiatric symptoms and mental factors more than the emotional experience a definite link, when the spirit of the symptoms disappear soon after lifting factors. (C) response to double, said the prison psychiatric detention. Patients in custody cases, the way the performance and behavior to answer questions with ridiculous features, giving the impression of severe dementia, for example, patients could not answer his name, age, and I do not know a few hands, a few fingers, can not distinguish early and later, the left and right, day and night. Sometimes he is mistaken, or could not utter the name of daily necessities, slow, movement is not flexible, dull expression, but the lifting of detention conditions, all patients with normal performance.
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Wikipedia Daquan
Pseudo-dementia pseudodementia Change is indeed not a real sense of mental retardation, is due to certain factors, particularly severe mental trauma and other psychological - caused by social factors, to a certain disturbance of consciousness arising in the context of temporary brain dysfunction. But their clinical manifestations intelligence deficits, it seems worse than the true dementia. After the majority of sudden varying lengths of time after a sudden disappearance of reaction is common in hysteria and mental illness.