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Alogia is a major diagnostic sign of schizophrenia, when organic mental disorders have been excluded. [19] In schizophrenia, negative symptoms including flattening of affect, avolition, and alogia are responsible for the considerable morbidity of the disease compared with other psychotic disorders. [24]
Schizophrenia is a mental disorder ... [42] [46] Apathy includes avolition, anhedonia, and social withdrawal; diminished expression includes blunt affect and alogia. [47]
The Scale for the Assessment of Negative Symptoms (SANS) is a rating scale that mental health professionals use to measure negative symptoms in schizophrenia.Negative symptoms are those conspicuous by their absence—lack of concern for one's appearance, and lack of language and communication skills, for example.
Negative symptoms include apathy, avolition, alogia, anhedonia, asociality, and blunted emotional affect. Apathy is an overall lack of interest or enjoyment, which relates to the negative symptom of blunted emotional affect. Blunted emotional affect includes a lack of facial expressions, lack of intonation while speaking, and little eye contact.
In schizophrenia, asociality is one of the main five "negative symptoms", with the others being avolition, anhedonia, reduced affect, and alogia. Due to a lack of desire to form relationships, social withdrawal is common in people with schizophrenia.
The dopamine hypothesis of schizophrenia or the dopamine hypothesis of psychosis is a model that attributes the positive symptoms of schizophrenia to a disturbed and hyperactive dopaminergic signal transduction. The model draws evidence from the observation that a large number of antipsychotics have dopamine-receptor antagonistic effects. The ...