Trouble de la pensée

A thought disorder (TD) is a disturbance in cognition which affects language, thought and communication. Psychiatric and psychological glossaries in 2015 and 2017 identified thought disorders as encompassing poverty of ideas, neologisms, paralogia, word salad, and delusions - all disturbances of thought content and form. Two specific terms have been suggested — content thought disorder (CTD) and formal thought disorder (FTD). CTD has been defined as a thought disturbance characterized by multiple fragmented delusions, and the term thought disorder is often used to refer to an FTD: a disruption of the form (or structure) of thought. Also known as disorganized thinking, FTD results in disorganized speech and is recognized as a major feature of schizophrenia and other psychoses (including mood disorders, dementia, mania, and neurological diseases). Disorganized speech leads to an inference of disorganized thought. Thought disorders include derailment, pressured speech, poverty of speech, tangentiality, verbigeration, and thought blocking. One of the first known cases of thought disorders, or specifically OCD as we know it today, was in 1691. John Moore, who was a bishop, had a speech in front of Queen Mary II, about "religious melancholy." Formal thought disorder affects the form (rather than of the content) of thought. Unlike hallucinations and delusions, it is an observable, objective sign of psychosis. FTD is a common core symptom of a psychotic disorder, and may be seen as a marker of severity and as an indicator of prognosis. It reflects a cluster of cognitive, linguistic, and affective disturbances that have generated research interest in the fields of cognitive neuroscience, neurolinguistics, and psychiatry. Eugen Bleuler, who named schizophrenia, said that TD was its defining characteristic. Disturbances of thinking and speech, such as clanging or echolalia, may also be present in Tourette syndrome; other symptoms may be found in delirium. A clinical difference exists between these two groups.

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En psychiatrie, le trouble de la pensée (TP) ou le désordre de la pensée survient lorsqu'un individu souffre de problèmes émotionnels ou comportementaux. Les symptômes peuvent inclure une fausse idée de soi-même, de la paranoïa, entendre ou voir ce que d'autres individus ne perçoivent pas, et une pensée ou parole déconnectée de la réalité ; des sentiments qui ne conviennent pas à la situation présente. Les patients souffrent d'une communication incompréhensible (de la parole à l'écriture), présumée refléter la pensée.

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