suicidality

自杀
  • 文章类型: Case Reports
    该病例介绍了一名被诊断为多系统萎缩帕金森病患者的66岁妇女的情况,该妇女接受了深部脑刺激(DBS)治疗,随后进行了两次自杀尝试。尽管接受了治疗和广泛的心理治疗,她的病情没有好转,导致一年内的自杀行为。值得注意的是,她对DBS治疗的有效性抱有不切实际的信念,对其结果表示不满。家庭动态很复杂,患者在应对日益恶化的健康状况的同时隐瞒自己的心理困扰。这种严重的痛苦最终导致在相对较短的时间内两次自杀企图。我们的精神科小组迅速介入,实施自杀方案并调整她的用药方案。尽管文献中记录了自杀意念的普遍性和DBS后的尝试,确切的原因仍然不确定,与神经免疫或神经通路有关。这个案例有助于科学的理解,因为它揭示了无效的DBS干预后的自杀企图。通过神经伦理分析,强调患者有权了解潜在的自杀风险和辅助自杀的可能性。因此,我们的案例强调了对DBS患者进行精神病学评估和干预以防止进一步自杀的重要性,专注于针对患者自主性和神经伦理原则的多学科方法。
    This case presents the situation of a 66-year-old woman diagnosed with Multiple System Atrophy Parkinsonian Type who underwent deep brain stimulation (DBS) therapy and subsequently made two suicide attempts. Despite receiving treatment and extensive psychotherapy, her condition did not improve, leading to suicidal behavior over the course of a year. Notably, she held unrealistic beliefs about the effectiveness of DBS therapy, expressing dissatisfaction with its outcomes. Family dynamics were complex, with the patient concealing her psychological distress while coping with her worsening health condition. This severe distress culminated in two suicide attempts within a relatively short timeframe. Our psychiatric team promptly intervened, implementing a suicidality protocol and adjusting her medication regimen. Despite a documented prevalence of suicidal ideation and attempts post-DBS in the literature, the exact causes remain uncertain, with the suggested involvement of neuroimmune or neurological pathways. This case contributes to scientific understanding by shedding light on suicide attempts following ineffective DBS interventions, emphasizing the patient\'s right to be informed about potential suicide risks and the possibility of assisted suicide through a neuroethical analysis. Therefore, our case underlines the importance of psychiatric evaluation and intervention in DBS patients to prevent further suicidality, focusing on a multidisciplinary approach tailored to the patient\'s autonomy and neuroethical principles.
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  • 文章类型: Journal Article
    在经济合作与发展组织国家中,韩国的自杀率最高;中学生和高中生的自杀企图呈上升趋势。各种因素导致青少年自杀的风险,对自杀预防的看法已经成为一个重要因素。本研究旨在调查中学生情绪和行为困难与自杀预防观念之间的关系,并探讨不同年龄的自杀观念差异。
    在社区中学生和高中生中进行了一项调查,包括530名参与者,从2020年到2021年。使用韩语版本的优势和困难问卷评估情绪和行为困难,参与者被要求填写一份关于预防自杀的重要性和可能性的问卷.使用相关检验和方差分析来检验变量之间的关系,和自杀意识根据年龄进行比较。
    显示较高力量或较低难度的参与者更有可能对自杀预防措施做出积极反应。他们还表现出高强度和低难度水平,因此同意预防自杀的重要性。关于与年龄相关的自杀观念,20-29岁的成年人报告自杀预防的可能性最低.
    自杀观念影响自杀发生率。因此,通过自杀预防运动和相关教育进行积极的社会参与对于改善这种观念至关重要。需要持续的关注和支持来解决这一问题。
    UNASSIGNED: South Korea has the highest suicide rate among Organisation for Economic Co-operation and Development countries; there is an increasing trend in suicide attempts among middle and high school students. Various factors contribute to the risk of suicide among adolescents, and the perception of suicide prevention has emerged as a significant factor. This study aimed to investigate the association between emotional and behavioral difficulties among middle and high school students and their perceptions of suicide prevention and to explore differences in suicide perception according to age.
    UNASSIGNED: A survey was conducted among community middle and high school students, including 530 participants, between 2020 and 2021. Emotional and behavioral difficulties were assessed using the Strengths and Difficulties Questionnaire-Korean version, and participants were asked to complete a questionnaire on the importance and possibility of suicide prevention. A correlation test and analysis of variance were used to examine the relationships between the variables, and suicide awareness was compared according to age.
    UNASSIGNED: The participants who displayed higher strength or lower difficulty were more likely to respond positively to suicide prevention measures. They also exhibited high strength and low difficulty levels, thus agreeing with the importance of suicide prevention. Regarding age-related perceptions of suicide, adults aged 20-29 years reported the lowest probability of suicide prevention.
    UNASSIGNED: Suicide perceptions influence the incidence of suicide. Therefore, active societal engagement through suicide prevention campaigns and related education is essential to improve such perceptions. Continuous attention and support are required to address this issue.
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  • 文章类型: Journal Article
    生活压力事件(SLE)和自杀意念(SI)在重度抑郁症(MDD)患者中普遍存在。关于失眠症状在SLE和SI之间的关联中的潜在作用知之甚少。这项三波前瞻性队列研究试图调查SLE之间的纵向关联,失眠症状,和SI在MDD患者中。研究人群包括511名MDD患者(平均年龄[SD],28.7[6.7]岁;67.1%为女性)。利用广义估计方程(GEE)来探索SLE暴露之间的前瞻性关联,失眠症状,和SI。此外,采用结构方程模型(SEM)估计失眠症状在SLE与SI关系中的纵向中介作用。我们的研究表明,在MDD患者中,累积SLE与SI纵向相关。我们进一步观察到SLE和SI之间的关联是由失眠症状显著介导的。临床医生评估MDD患者,尤其是那些有SLE历史的人,可以仔细评估并及时治疗失眠症状,作为对其抑郁症的个性化评估的一部分,从而实现对MDD患者自杀行为的早期预防和干预。
    Stressful life events (SLEs) and suicidal ideation (SI) are prevalent in persons with major depression disorder (MDD). Less is known about the underlying role of insomnia symptoms in the association between SLEs and SI. This three-wave prospective cohort study sought to investigate the longitudinal association among SLEs, insomnia symptoms, and SI in persons with MDD. The study population included 511 persons with MDD (mean [SD] age, 28.7 [6.7] years; 67.1% were females). Generalized estimated equations (GEEs) were utilized to explore prospective association among exposure of SLEs, insomnia symptoms, and SI. Additionally, a structural equation model (SEM) was employed to estimate the longitudinal mediating effect of insomnia symptoms in the relationship between SLEs and SI. Our study demonstrated that cumulative SLEs were determined to be longitudinally associated with SI in persons with MDD. We further observed that the association between SLEs and SI was significantly mediated by insomnia symptoms. Clinicians assessing persons with MDD, especially those with the history of SLE, could carefully evaluate and promptly treat insomnia symptoms as part of personalized assessment of their depressive illness, thereby achieving early prevention and intervention for suicidal behaviors in persons with MDD.
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  • 文章类型: Journal Article
    非自杀性自我伤害(NSSI)既可以发生在自杀企图(SA)之前,也可以同时发生。已经提出了导致NSSI青年过渡到SA的潜在机制/因素(包括社会认知的作用),尽管他们应该得到证实。因此,该研究旨在探索心理理论在根据SA的存在区分NSSI青少年样本(15-24岁)中的作用。我们使用故意自我伤害量表(DSHI)和哥伦比亚自杀严重程度等级量表(C-SSRS)将样本分为4组:对照组(非NSSInotSA),无SA的NSSI(NSSInotSA),NSSI与SA(NSSIplusSA),和SA没有NSSI(SAonly)。NSSIplusSA患者显示出比NSSInotSA(p=0.0016)和SAonly组(p=0.0198)更高的眼睛阅读测验(RMET)得分(指示ToM能力),而SAonly患者的RMET评分低于对照组(p=0.0214)。用于区分NSSInotSA和NSSIplusSA的多元回归模型发现RMET与LOSCS-CSC(自我批评量表-比较自我批评水平)之间存在显着关联(pC=0.0802,pD=0.0016,pG=0.0053)。我们的发现支持以下假设:肥厚性情感ToM可能与青年NSSI中SA的发生有关。进一步更大的纵向研究应该证实这些初步发现,通过探索所有的社会认知维度。
    Non-suicidal self-injury (NSSI) can both precede and co-occur with suicidal attempts (SA). Underlying mechanisms/factors leading to the transition to SA in NSSI youths have been proposed (including the role of social cognition), despite they should be yet confirmed. Therefore, the study aims at exploring the role of the Theory of Mind in the differentiation of a sample of NSSI youngsters (aged 15-24) according to the presence of SA. We divided the sample into 4 groups using the Deliberate Self Harm Inventory (DSHI) and Columbia Suicide Severity Rating Scale (C-SSRS): control group (notNSSInotSA), NSSI without SA (NSSInotSA), NSSI with SA (NSSIplusSA), and SA without NSSI (SAonly). NSSIplusSA patients displayed higher Reading the Mind in the Eyes Test (RMET) scores (indicative of ToM abilities) than both the NSSInotSA (p=0.0016) and SAonly groups (p=0.0198), while SAonly patients showed lower RMET scores compared to the control group (p=0.0214). Multiple regression models used to differentiate NSSInotSA and NSSIplusSA found a significant association between RMET and LOSCS-CSC (Level Of Self-Criticism Scale-Comparative Self-Criticism) (pC=0.0802, pD=0.0016, pG=0.0053). Our findings supported the hypothesis that a hypertrophic affective ToM may possibly be associated with the occurrence of SA in youth NSSI. Further larger and longitudinal studies should confirm these preliminary findings, by exploring all social cognition dimensions.
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  • 文章类型: Journal Article
    抑郁和冲动性在病因上与酒精依赖(AD)有关,并且已知会影响病程和结果。仅在少数AD患者的研究中研究了冲动与抑郁症状之间的关系。
    本研究旨在探讨AD患者的冲动性与抑郁症状之间的关系。
    我们的研究是在三级护理精神病学研究所的住院患者中进行的。研究设计是横断面的。使用Barratt冲动量表(BIS-11)和停止信号任务(SST)评估全球冲动和行为冲动的水平,分别,在60名最近戒毒的AD住院患者中。汉密尔顿抑郁量表(HAM-D)用于测量抑郁症状。分析结果以检查抑郁症状与冲动的关系。采用Pearson相关系数或Spearman秩相关和线性回归分析探讨定量变量之间的关联。
    发现HAM-D评分较高的患者在BIS-11的所有三个子量表上的评分均显着较高。注意冲动性分量表相关性最强(r=0.53,P<0.001)。与运动冲动相比,抑郁症状与认知冲动更密切相关(r=0.54,P<0.0001),与行为冲动无关。调整其他变量,认知冲动是抑郁症状严重程度的最强预测因子.
    该研究表明,在AD患者中,冲动性和抑郁症状之间存在很强的关联。这种关系可能更适用于认知冲动,反映冲动决策与冲动行为相比的作用。
    UNASSIGNED: Depression and impulsivity are etiologically linked to alcohol dependence (AD) and are known to affect course and outcomes. The relationship between impulsivity and depressive symptoms has been investigated only in a few studies of individuals with AD.
    UNASSIGNED: This study aimed to explore the association between impulsivity and depressive symptoms in patients with AD.
    UNASSIGNED: Our study was conducted in the inpatient setup of a tertiary care psychiatry institute. The study design is cross-sectional. The Barratt Impulsiveness Scale (BIS-11) and stop signal task (SST) were used to assess levels of global impulsivity and behavioral impulsivity, respectively, among 60 recently detoxified inpatients with AD. The Hamilton Depression Rating Scale (HAM-D) was used to measure depressive symptoms. The results were analyzed to examine the association of depressive symptoms with impulsivity. Pearson\'s coefficient of correlation or Spearman\'s rank correlation and linear regression analysis were performed to explore the association between quantitative variables.
    UNASSIGNED: Patients with higher HAM-D scores were found to have significantly higher score on all three subscales of the BIS-11. The attention impulsivity subscale had the strongest correlations (r = 0.53, P < 0.001). Depressive symptoms were more strongly correlated with cognitive impulsivity (r = 0.54, P< 0.0001) compared with motor impulsivity and were not significantly associated with behavioral impulsivity. Adjusting for other variables, cognitive impulsivity was found to be the strongest predictor of the severity of depressive symptoms.
    UNASSIGNED: The study showed a strong association between impulsivity and depressive symptoms in individuals with AD. This relationship may apply more to cognitive impulsivity, reflecting the role of impulsive decisions compared with impulsive actions.
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  • 文章类型: Journal Article
    背景:与COVID-19相关的污名化是指其他人对COVID-19相关的判断,使个人贬值。对医护人员的这种污名化可能会造成心理负担和负面后果。这种污名化可能特别使专职医疗受训者(AHTs)和研究生年医生(PGYDs)不知所措,因为他们刚刚开始医疗生涯。据报道,社会支持和资源支持有利于心理健康,减少污名化。因此,本研究使用横断面研究设计来调查感知的污名,自我污名,心理困扰,和负面结果(包括情绪疲惫,台湾的AHTs和PGYDs失眠和自杀意念)。
    方法:7月至12月之间发布的在线调查,2022年收到522份回复。使用21项抑郁症评估变量,焦虑和压力量表,失眠严重程度指数和一系列自行设计的问题来评估社会支持,资源支持,感知到的耻辱,自我污名,情绪疲惫,和自杀意念。
    结果:结构方程模型表明,感知的污名与自我污名相关(标准化系数[β]=0.428,p<0.001),自我污名与心理困扰相关(β=0.197,p<0.001),以及与情绪疲惫有关,失眠,和自杀意念(β=0.349,0.556和0.212,所有p值<0.001)。虽然社会支持和资源支持与感知的污名(β=-0.175和-0.152,p<0.01),在社会支持和情绪衰竭之间发现了额外的关联(β=-0.093,p<0.001),以及资源支持和失眠之间(β=-0.120,p<0.001)。
    结论:结果显示,与COVID-19相关的污名化与情绪衰竭的有害后果有关,失眠和自杀意念。关于社会支持和资源支持与三个负关联的关联的明确路径被发现是可能的解决方案。减少污名化和这些负面结果的策略,或改善心理健康将有利于AHTs和PGYDs保持健康的精神状态。
    BACKGROUND: COVID-19-related stigmatization refers to COVID-19-related judgements by others that devalue the individual. Such stigmatization towards healthcare workers may cause psychological burden and negative consequences. Such stigmatization may have particularly overwhelmed allied health trainees (AHTs) and post-graduate year doctors (PGYDs) because they just started their medical career. Social support and resource support have been reported to benefit psychological health and reduce stigmatization. Therefore, the present study used a cross-sectional study design to investigate the association between perceived stigma, self-stigma, psychological distress, and negative outcomes (including emotional exhaustion, insomnia and suicidal ideation) among AHTs and PGYDs in Taiwan.
    METHODS: An online survey distributed between July and December, 2022 received 522 responses. Variables were assessed using the 21-item Depression, Anxiety and Stress Scale, Insomnia Severity Index and a series of self-designed questions to assess social support, resource support, perceived stigma, self-stigma, emotional exhaustion, and suicidal ideation.
    RESULTS: Structural equation modeling showed that perceived stigma was associated with self-stigma (standardized coefficient [β] = 0.428, p < 0.001), and self-stigma was associated with psychological distress (β = 0.197, p < 0.001), as well as being associated with emotional exhaustion, insomnia, and suicidal ideation (β = 0.349, 0.556 and 0.212, all p-values < 0.001). While social support and resource support were negatively associated with perceived stigma (β= - 0.175 and - 0.152, p < 0.01), additional associations were found between social support and emotional exhaustion (β= - 0.093, p < 0.001), as well as between resource support and insomnia (β= - 0.120, p < 0.001).
    CONCLUSIONS: The results showed that COVID-19 related stigmatization was correlated to the detrimental consequences of emotional exhaustion, insomnia and suicidal ideation. Clear paths regarding the associations of social support and resource support with the three negative associations were found as the possible solutions. Strategies to reduce the stigmatization and these negative outcomes, or improve the psychological health will benefit AHTs and PGYDs in maintaining a healthy mental status.
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  • 文章类型: Journal Article
    老年人的高自杀率是一个相关的公共卫生问题。社会隔离或丧偶以及身体下降对成年后的自杀行为起着至关重要的作用。先前的证据表明,士气低落是自杀的重要危险因素。士气低落是否是老年人的相关现象,这可能是高自杀率的原因尚不清楚。
    在对德国普通人群的调查中评估的士气低落量表II(DS-II)得分针对老年人(年龄≥65岁)进行了调查。比较了老年人(≥65岁)和年轻人(<65岁)之间以及年轻人(65-74岁)之间的DS-II评分,中老年(75-84年),和老年人(85+y)。我们测试了社会人口统计学因素对老年人DS-II得分的影响。
    样本包括N=545个≥65岁的成年人和N=1922个<65岁的成年人。与年轻人相比,老年人的DS-II得分增加(F(1,2465)=6.1;p=0.013;d=0.09),从年轻人到老年人(Mdiff=2.7;95%CI0.45,5.46;p=0.034)。1/4的≥65岁的个体和近一半的老年个体报告DS-II评分高于截止值>5。与受保护的伴侣一起生活,以免使老年人士气低落。
    这项研究为老年人的士气低落率增加提供了初步证据,尤其是女性,这部分与伙伴关系地位有关。我们建议,士气低落被认为是成年后的重要实体,标准的心理筛查可能会错过。
    UNASSIGNED: High suicide rates in older adults are a relevant public health concern. Social isolation or widowhood as well as physical decline play a crucial role for suicidality in older adulthood. Previous evidence suggested that demoralization is an important risk factor for suicide. Whether demoralization is a relevant phenomenon in older adulthood which possibly could account for high suicide rates remains unclear.
    UNASSIGNED: Demoralization Scale II (DS-II) scores assessed in a survey of the German general population were investigated with respect to older adults (aged ≥ 65 years). DS-II scores were compared between older (≥ 65 years) and younger (< 65 years) adulthood and between young-old (65-74y), middle-old (75-84y), and old-old (85+y) individuals. We tested the impact of sociodemographic factors on DS-II scores within older adults.
    UNASSIGNED: The sample comprised N = 545 adults ≥ 65 years and N = 1922 adults < 65 years. DS-II scores increased in older compared to younger adults (F(1,2465) = 6.1; p = 0.013; d = 0.09) and further from young-old to old-old (Mdiff = 2.7; 95% CI 0.45, 5.46; p = 0.034). One-fourth of individuals ≥ 65 years and almost half of old-old individuals reported DS-II scores above the cut-off > 5. Living with a partner protected from demoralization in old-old individuals.
    UNASSIGNED: This study provides first evidence for an increased rate of demoralization in very old adults, in particular women, which is partly related to partnership status. We suggest that demoralization is considered as a crucial entity in older adulthood which can be missed by standard psychological screenings.
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  • 文章类型: Journal Article
    一些理论和临床观察结果导致了以下假设:由于难以以功能性方式调节羞耻,病理性自恋可能与自杀意念有关。本研究调查了内疚的作用,病理性自恋和自杀意念之间的关系中的羞耻和竞争。
    一组自我报告问卷由936名意大利成年人的样本完成。其中包括意大利语版本的“内疚和羞耻的态度”(GASP)量表,病态自恋量表,贝克自杀意念量表,和自恋崇拜和竞争问卷。
    测试GASP的阶乘结构及其不变性的结构方程模型产生了令人满意的结果。此外,羞耻是自恋傲慢与自杀意念之间关系的重要因素。然而,β回归系数较低。
    这些发现表明,尽管临床医生应该考虑病理性自恋患者的自杀意念的存在,以及他们对羞耻的适应不良调节,这些变量之间的关系很复杂,值得进一步研究。
    UNASSIGNED: Several theoretical and clinical observations lead to the hypothesis that pathological narcissism could be associated with suicide ideation due to the difficulty in regulating shame in a functional way. The present study investigated the roles of guilt, shame and rivalry in the relationship between pathological narcissism and suicidal ideation.
    UNASSIGNED: A set of self-report questionnaires was completed by a sample of 936 Italian adults. These included the Italian version of the Guilt and Shame Proneness (GASP) scale, the Pathological Narcissism Inventory, the Beck Scale for Suicidal Ideation, and the Narcissism Admiration and Rivalry Questionnaire.
    UNASSIGNED: A structural equation model that tested the factorial structure of the GASP and its invariance produced satisfactory results. Moreover, shame was a significant factor in the relationship between narcissism grandiosity and suicidal ideation. However, beta regression coefficients were low.
    UNASSIGNED: These findings suggest that despite clinicians should consider the presence of suicidal ideation in patients with pathological narcissism and their maladaptive regulation of shame, the relationship between these variables is complex and deserve further investigation.
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  • 文章类型: Journal Article
    注意缺陷多动障碍(ADHD)是一种常见的神经发育障碍,会破坏大脑功能,以多动症为特征,冲动,和注意力不集中。由于不同的表现和复杂的病因因素导致多动症的发展,随着它持续到成年,必须研究ADHD。研究人员对多动症和自杀之间的关系感兴趣,这是一个严重的公共卫生问题,在美洲患病率上升。目前的文献揭示了关于精神合并症在ADHD患者自杀行为发展中的重要性的相互矛盾的观点。因此,本研究旨在确定有自杀风险的成年ADHD患者与无自杀风险的成年ADHD患者之间是否存在显著差异.这项研究是一项自然主义的回顾性图表审查试点研究,使用了2023年1月至2023年8月确诊为ADHD的成年人样本。使用便利抽样和纳入和排除标准集,我们从MedAccess电子病历中依次收集患者数据.对照组和实验组各包括50名患者(100名),年龄从19岁到58岁。我们的定量数据采用非参数统计检验进行分析,包括卡方检验和曼-惠特尼U检验。结果显示,患有自杀风险的ADHD患者与(1)边缘性人格障碍之间存在显着关联;(2)暴饮暴食症;(3)七个特定的社会心理风险因素;(4)抗抑郁药物试验的数量更高。没有发现与其他精神疾病的显著关联;然而,在危险因素方面存在重要的性别差异。我们的初步研究揭示了有自杀风险的成年ADHD患者与无自杀风险的患者之间的一些显着差异。然而,鉴于我们有限的样本量和局限性,我们希望我们的研究鼓励更大规模的研究进一步研究这种关系,以提高其普遍性.
    Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental disorder that disrupts brain functioning and is characterized by hyperactivity, impulsivity, and inattention. With varying presentations and complex etiological factors contributing to the development of ADHD, along with its persistence into adulthood, ADHD must be studied. Researchers have taken an interest in the relationship between ADHD and suicide, which is a serious public health concern with increasing prevalence rates in the Americas. The current literature reveals conflicting views on the importance of psychiatric comorbidities in the development of suicidal behaviours in ADHD patients. Therefore, this study aimed to determine whether there were significant differences between adult ADHD patients with suicide risk and adult ADHD patients without suicide risk. This study was a naturalistic retrospective chart review pilot study that used a sample of adults with a confirmed diagnosis of ADHD from January 2023 to August 2023. Using convenience sampling and sets of inclusion and exclusion criteria, patient data were sequentially collected from Med Access electronic medical records. The control and experimental groups each consisted of 50 patients (100) ranging from 19 to 58 years old. Our quantitative data were analyzed using non-parametric statistical tests, including the Chi-Square test and the Mann-Whitney U test. The results showed significant associations between ADHD patients with suicide risk and (1) borderline personality disorder; (2) binge eating disorder; (3) seven specific psychosocial risk factors; and (4) a higher number of antidepressant medication trials. No significant associations were found with other psychiatric disorders; however, there are important sex differences in terms of the risk factors. Our pilot study reveals several significant differences between adult ADHD patients with suicide risk and those without suicide risk. However, given our limited sample size and limitations, we hope our study encourages larger-scale studies to further investigate this relationship to improve its generalizability.
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  • 文章类型: Journal Article
    目前,精神病学实践缺乏可靠的预测工具和对自杀想法和行为(STB)的足够详细的机械理解,无法提供及时和个性化的干预措施.开发跨行为集成的STB计算模型,认知和神经层面的分析有助于更好地理解STB漏洞并指导个性化干预.为此,我们提出了一个基于主动推理框架的计算模型。有了这个模型,我们显示了几个STB风险标记-绝望,巴甫洛夫偏差和主动逃逸偏差-通过驱动器相互关联,以最大化一个人的模型证据。我们提出了四种可能产生这些影响的方式:(1)增加从厌恶结果中学习,(2)减少对意外结果的信念衰减,(3)增加压力敏感性和(4)降低压力源可控性。这些建议源于考虑STB中涉及的神经回路:蓝斑-去甲肾上腺素(LC-NE)系统与杏仁核(Amy),背前额叶皮质(dPFC)和前扣带皮质(ACC)介导对急性应激和波动性的学习反应,以及背中缝核-5-羟色胺(DRN-5-HT)系统和腹内侧前额叶皮质(vmPFC)如何基于感知的应激源可控性介导应激反应.我们通过模拟避免/EscapeGo/No-Go任务中的性能来验证该模型,该任务复制了最近的行为发现。这作为概念的证明,并且提供了计算假设空间,其可以被经验地测试并且用于区分计划性STB亚型与脉冲性STB亚型。我们讨论了所提出的治疗反应预测模型的相关性,包括药物治疗和心理治疗,以及与压力反应性和自杀风险有关的性别差异。
    Currently, psychiatric practice lacks reliable predictive tools and a sufficiently detailed mechanistic understanding of suicidal thoughts and behaviors (STB) to provide timely and personalized interventions. Developing computational models of STB that integrate across behavioral, cognitive and neural levels of analysis could help better understand STB vulnerabilities and guide personalized interventions. To that end, we present a computational model based on the active inference framework. With this model, we show that several STB risk markers - hopelessness, Pavlovian bias and active-escape bias - are interrelated via the drive to maximize one\'s model evidence. We propose four ways in which these effects can arise: (1) increased learning from aversive outcomes, (2) reduced belief decay in response to unexpected outcomes, (3) increased stress sensitivity and (4) reduced sense of stressor controllability. These proposals stem from considering the neurocircuits implicated in STB: how the locus coeruleus - norepinephrine (LC-NE) system together with the amygdala (Amy), the dorsal prefrontal cortex (dPFC) and the anterior cingulate cortex (ACC) mediate learning in response to acute stress and volatility as well as how the dorsal raphe nucleus - serotonin (DRN-5-HT) system together with the ventromedial prefrontal cortex (vmPFC) mediate stress reactivity based on perceived stressor controllability. We validate the model by simulating performance in an Avoid/Escape Go/No-Go task replicating recent behavioral findings. This serves as a proof of concept and provides a computational hypothesis space that can be tested empirically and be used to distinguish planful versus impulsive STB subtypes. We discuss the relevance of the proposed model for treatment response prediction, including pharmacotherapy and psychotherapy, as well as sex differences as it relates to stress reactivity and suicide risk.
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