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Simple-type schizophrenia is characterized by negative ("deficit") symptoms, such as avolition, apathy, anhedonia, reduced affect display, lack of initiative, lack of motivation, low activity; with absence of hallucinations or delusions of any kind. Simple schizophrenia was included as a proposed diagnosis for further study in the appendix of ...
One of the symptoms needs to be either delusions, hallucinations, or disorganized speech. A second symptom could be one of the negative symptoms, or severely disorganized or catatonic behaviour. [10] A different diagnosis of schizophreniform disorder can be made before the six months needed for the diagnosis of schizophrenia. [10]
Sub-classifications of Schizophrenia ICD-10 Description DSM-IV-TR Equivalent Paranoid (F20.0 Delusions and hallucinations are present but thought disorder, disorganized behavior, and affective flattening are not prominent. Paranoid type (295.3) Hebephrenic (F20.1) Thought disorder and flat affect are present together. Disorganized type (295.1)
Schizophreniform disorder is a type of mental illness that is characterized by psychosis and closely related to schizophrenia.Both schizophrenia and schizophreniform disorder, as defined by the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR), have the same symptoms and essential features except for two differences: the level of functional impairment and the duration of symptoms.
The DSM-5 criteria puts more emphasis on social or occupational dysfunction than the ICD-10. [39] The ICD-10, on the other hand, puts more emphasis on first-rank symptoms. [40] [41] The current proposal for the ICD-11 criteria for schizophrenia recommends adding self-disorder as a symptom. [42]
Brief psychotic disorder—according to the classifications of mental disorders DSM-IV-TR and DSM-5—is a psychotic condition involving the sudden onset of at least one psychotic symptom (such as disorganized thought/speech, delusions, hallucinations, or grossly disorganized or catatonic behavior) lasting 1 day to 1 month, often accompanied by emotional turmoil.
The causes of schizophrenia that underlie the development of schizophrenia, a psychiatric disorder, are complex and not clearly understood.A number of hypotheses including the dopamine hypothesis, and the glutamate hypothesis have been put forward in an attempt to explain the link between altered brain function and the symptoms and development of schizophrenia.
In the ICD-9 was a diagnosis 295.79: recurrent schizophrenia without other specifications (also known as periodic schizophrenia or circular schizophrenia). It was deleted from the ICD-10. In the DSM-5 there is no such diagnosis, either. According to this research the syndrome has six stages in its course: initial general-somatic and vegetative ...
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