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Reduced affect display, sometimes referred to as emotional blunting or emotional numbing, is a condition of reduced emotional reactivity in an individual. It manifests as a failure to express feelings either verbally or nonverbally, especially when talking about issues that would normally be expected to engage emotions.
Flat being the most severe in where there is very little to absolutely no show of emotions. Restricted and blunted are, respectively, less severe. Disorders involving these reduced affect displays most commonly include schizophrenia , post traumatic stress disorder , depression , autism and persons with traumatic brain injuries. [ 20 ]
A multitude of terms have been used to refer to DDM of varying severities and varieties, including apathy, abulia, akinetic mutism, athymhormia, avolition, amotivation, anhedonia, psychomotor retardation, affective flattening, akrasia, and psychic akinesia (auto-activation deficit or loss of psychic self-activation), among others.
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.
An example of a well-studied [44] genetic biomarker in schizophrenia is the single nucleotide polymorphism in the HLA-DQB1 gene, which is part of the human leukocyte antigen (HLA) complex. A G to C replacement on position 6672 predicts risk of agranulocytosis , a side effect of clozapine that can be fatal.
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 ]
Schizoaffective disorder is a mental disorder characterized by symptoms of both schizophrenia and a mood disorder - either bipolar disorder or depression. [4] [5] The main diagnostic criterion is the presence of psychotic symptoms for at least two weeks without prominent mood symptoms. [5]
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]
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