The relationship between violence and insight and cognitive functions in patients with schizophrenia

Köşger, Ferdi; Eşsizoğlu, Altan; Sönmez, İpek; Güleç, Gülcan; Genek, Muge; Akarsu, Özlem

doi:10.5080/u13575

Cited by 6 publications

(8 citation statements)

References 10 publications

(13 reference statements)

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“…Two studies were conducted in the United States [ 53 , 54 ], two studies were carried out in the United Kingdom [ 55 , 56 ], two in Italy [ 57 , 58 ], two in Ireland [ 13 , 59 ], and two in Japan [ 60 , 61 ]. Finally, one study was conducted in India [ 62 ], one in Norway [ 63 ], and one in Turkey [ 64 ].…”

Section: Resultsmentioning

confidence: 99%

“…Appendix A and Appendix B summarized the risk of bias for individual studies. Overall, the quality of studies was rated as medium-high in 15 of the 19 examined studies (78.9%), with only 4 studies rated as medium-low quality or doubtful (21.1%) [ 13 , 51 , 64 ]. A summary assessment was calculated based on the number of items evaluated as a Yes in the AXIS tool.…”

Section: Resultsmentioning

confidence: 99%

“…study [64] and two suicide studies [13,51] were found in the four levels as they were considered poor quality prognostic cohort studies.…”

Section: Certainty Of Evidencementioning

confidence: 99%

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Neurocognitive Suicide and Homicide Markers in Patients with Schizophrenia Spectrum Disorders: A Systematic Review

Tomé-Fernández,

Berbegal-Bernabeu,

Sánchez-Sansegundo

et al. 2023

Behavioral Sciences

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Suicide and homicide are considered important problems in public health. This study aims to identify the cognitive performance of suicidal and homicidal behaviors in people with schizophrenia spectrum disorders, as well as examining whether there are shared neuropsychological mechanisms. A systematic review of the recent literature was carried out from September 2012 to June 2022 using the Medline (via PubMed), Scopus, Embase, and Cochrane databases. Among the 870 studies initially identified, 23 were finally selected (15 related to suicidal behaviors and 8 to homicidal behaviors). The results evidenced a relationship between impairment of cognitive performance and homicidal behavior; meanwhile, for suicidal behaviors, no consistent results were found. High neuropsychological performance seems to act as a protective factor against violent behavior in people with schizophrenia spectrum disorders, but not against suicidal behavior; indeed, it can even act as a risk factor for suicidal behavior. To date, there is insufficient evidence that shared neurocognitive mechanisms exist. However, processing speed and visual memory seem to be affected in the presence of both behaviors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Neurocognitive Suicide and Homicide Markers in Patients with Schizophrenia Spectrum Disorders: A Systematic Review

Tomé-Fernández,

Berbegal-Bernabeu,

Sánchez-Sansegundo

et al. 2023

Behavioral Sciences

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“…The rates of aggressive or violent behaviours and criminal offences have been reported to be higher among patients with schizophrenia than in the general population. [1][2][3][4][5][6][7][8][9] People with schizophrenia are 20-times more likely than the general population to commit homicide. 10 Approximately 1 in 600 patients with schizophrenia commit homicide prior to treatment, and the rate of homicide after antipsychotic treatment is about one in 10 000 patients per year.…”

Section: Introductionmentioning

confidence: 99%

Prevalence of Aggressive or Violent Behaviour in Thai Patients with Schizophrenia: a Cross-Sectional Study

Maneeton

Jaiyen

et al. 2019

East Asian Arch Psychiatry

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Objective: This study aimed to determine the prevalence of violence and factors associated with aggressive or violent behaviour in Thai patients with schizophrenia. Methods: This cross-sectional study was conducted in all patients with schizophrenia aged ≥18 years admitted to Suan Prung Psychiatric Hospital, Thailand, between January and November 2014. Baseline interviews were conducted by a psychiatrist and psychiatric nurses. Accessibility to weapons and toxic chemicals was evaluated. Results: Of 230 patients with schizophrenia screened, 207 (162 men and 45 women) were included. Of them, only 16 (7.7%) patients had aggressive or violent behaviour, including verbal aggression (n = 7), physical aggression (n = 5), and aggression against property (n = 4). Nonetheless, only 2 (12.5%) of them had been charged by the police. The weapon score was higher in violent than non-violent patients (p < 0.05). Binary logistic regression analysis showed that the weapon score was the only significant predictor of violence. Conclusion: Patients with schizophrenia with greater access to weapons were more likely to have aggressive or violent behaviour. Routine screening for access to weapons in clinical settings and adequate treatment of psychotic symptoms may reduce the incidence of aggressive or violent behaviour and violent offences.

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“…The schizophrenia factor analysis method believes that the three-dimensional symptom grouping can be more conducive to understanding the disease and researching the pathomechanism [2]. The three dimensions mean positive symptom (hallucination, delusion), negative symptom (poverty of speech, decrease in the spontaneous movement, apathy) and depersonalization symptom (formal thought disorder, bizarre behavior, inappropriate emotion) [3]. Meta's analysis [4] found that the negative symptom might be correlated with the dorsolateral and anterolateral prefrontal cortex and ventral striatum, the positive symptom might be correlated with the medial prefrontal cortex and medial temporal lobe and the depersonalization symptom might be correlated with the dorsolateral prefrontal lobe.…”

Section: Introductionmentioning

confidence: 99%

Study on multimodal functional magnetic resonance images of schizophrenic patients with initial negative symptom

Huang¹,

Li²,

Sun³

et al. 2018

biomedicalresearch

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Objective: To study the characteristics of the multimodal functional Magnetic Resonance Imaging (fMRI) of schizophrenia patients with initial negative symptom. Methods: From January 2014 to January 2016, 30 cases of schizophrenia patients with the initial negative symptom and 30 cases of schizophrenia patients with the initial positive symptom were involved in our study. Besides, other 30 cases were matched into the healthy control based on the gender, age and education level. The 3D structure Magnetic Resonance Imaging (MRI) data and functional MRI data of all patients were collected. The voxel-based morphometry was used to analyse different brain regions in structure MRI data among those three groups. In addition, we analysed the correlation between all functions of the whole brain in the resting state and different brain regions. Results: The volume of the gray matter in the right dorsolateral prefrontal lobe of the patients with initial negative symptom was significantly higher than that of patients with initial positive symptom. Moreover, in the control group, the whole brain's functional connectivity was decreased in the dorsolateral prefrontal cortex under a resting state. The difference was mainly on functional connectivity between the right dorsolateral prefrontal cortex-right medial prefrontal cortex and right dorsolateral prefrontal cortex-right caudate nucleus. The Z value of right medial prefrontal cortex in the negative symptom group was significantly lower than those of other two groups. The right caudate nucleus Z value was significantly higher than those of other two groups. When the N-back working memory task was given, the different brain regions in activations among the three groups were the left dorsolateral prefrontal cortex, medial prefrontal cortex/anterior cingulated cortex and posterior cingulated cortex, the inhibition degree against the medial prefrontal cortex/anterior cingulated cortex and posterior cingulated cortex of patients with the initial negative symptom as primary type was significantly decreased and the dorsolateral prefrontal activation was significantly increased. Conclusion: It has a significant value to diagnose and identify the schizophrenia with the initial negative symptom through the characteristics of the multimodal fMRI.

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The relationship between violence and insight and cognitive functions in patients with schizophrenia

Cited by 6 publications

References 10 publications

Neurocognitive Suicide and Homicide Markers in Patients with Schizophrenia Spectrum Disorders: A Systematic Review

Neurocognitive Suicide and Homicide Markers in Patients with Schizophrenia Spectrum Disorders: A Systematic Review

Prevalence of Aggressive or Violent Behaviour in Thai Patients with Schizophrenia: a Cross-Sectional Study

Study on multimodal functional magnetic resonance images of schizophrenic patients with initial negative symptom

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