Dr Benson said: “It has been known for over a hundred years that individuals with psychotic illnesses have a variety of eye movement abnormalities but until our study, using a novel battery of tests, no one thought the abnormalities were sensitive enough [scotsman.com]

' and 'niacin-flush-impaired' subtypes." [medscape.com]

Normally, when people are given high doses of niacin, their skin reddens and can tingle, burn, or itch; however, many individuals with schizophrenia experience limited or no flushing to the same high dose amount. [nutraingredients.com]

However, the researchers suggest that individuals with psychosis and the risky NAPRT1 gene variant may not present with dermatitis. [nutraingredients.com]

Conclusions Negative symptoms such as blunted affect, alogia, anhedonia, avolition, and asociality can be clustered into two main clusters: blunted affect and alogia cluster and anhedonia, avolition, and asociality cluster [ 4 ]. [intechopen.com]

Diseases ( ICD-10 ). [1] It is not included in the current Diagnostic and Statistical Manual of Mental Disorders ( DSM-5 ) or the upcoming ICD-11. [2] Simple-type schizophrenia is characterized by negative ("deficit") symptoms, such as avolition, apathy, anhedonia [en.wikipedia.org]

Deficit) Symptoms "Negative" symptoms disrupt normal emotions and behaviors and include: Social withdrawal "Flat affect," dull or monotonous speech, and lack of facial expression Difficulty expressing emotions Lack of self-care Inability to feel pleasure (anhedonia [onhealth.com]

In psychiatric terminology: blunted or flat affect (emotional inexpressiveness and apparent unresponsiveness); alogia (poverty of speech); asociality (apparent lack of desire for the company of others); anhedonia (apparent inability to show or feel pleasure [health.harvard.edu]

The presence of affect-related, non-specific symptomatology, with anxiety, low frame of mind, anergia, apathy and anhedonia, together with the repeated occasions in which the patient expressed suicidal ideation, were the reason that the initial diagnoses [elsevier.es]

Normally, when people are given high doses of niacin, their skin reddens and can tingle, burn, or itch; however, many individuals with schizophrenia experience limited or no flushing to the same high dose amount. [nutraingredients.com]