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Simple-type schizophrenia is a sub-type of schizophrenia included in the International Classification of Diseases , [1] in which it is classified as a mental and behaviour disorder. [2] It is not included in the current Diagnostic and Statistical Manual of Mental Disorders ( DSM-5 ) or the upcoming ICD-11 , [ 3 ] effective 1 January 2022. [ 4 ]
In schizophrenia, patients experience two types of symptoms: positive and negative. Positive symptoms include behavior added on to a person's daily functioning. For instance, delusions , hallucinations , disorganized speech, disorganized behavior and thought are all positive symptoms.
Symptoms in Schizophrenia, a 1938 silent film. Basic symptoms of schizophrenia are subjective symptoms, described as experienced from a person's perspective, which show evidence of underlying psychopathology. Basic symptoms have generally been applied to the assessment of people who may be at risk to develop psychosis. Though basic symptoms are ...
The most common model put forward was the dopamine hypothesis of schizophrenia, which attributes psychosis to the mind's faulty interpretation of the misfiring of dopaminergic neurons. [129] This has been directly related to the symptoms of delusions and hallucinations.
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.
Schizophrenia is now treated by medications known as antipsychotics (or neuroleptics) that typically reduce dopaminergic activity because too much activity has been most strongly linked to positive symptoms, specifically persecutory delusions. Dopaminergic drugs induce the characteristic auditory hallucinations of schizophrenia if they are ...
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