惊反射在创伤后应激障碍研究中的应用:高唤醒与恐惧抑制

创伤后应激障碍(PTSD)是唯一在诊断标准中包含惊反射改变的精神疾病.相比自我报告法,对惊反射的实验室测量与总体症状关联更紧密,并已积累了较多神经机制研究成果,可作为连接前临床与临床研究的桥梁.在惊反射应用于PTSD研究的初期,它主要作为PTSD患者高唤醒症状的客观指标,但是尚未发现惊反射强度的变化与总体症状的明确关系.近年来,惊反射与情境性焦虑、恐惧抑制等新范式结合,发现特定情境下惊反射改变是PTSD患者特有的表现.惊反射在创伤应激障碍研究中所取得的新进展对PTSD病理机制的探索和临床诊断都有所启发和推进.     

CRF受体对五羟色胺系统的调节作用及早期环境因素的影响

早期环境因素持续影响脑与行为的发展,增加个体成年后应激相关精神疾病患病的易感性.应激反应的中枢启动因子促肾上腺皮质激素释放因子(corticotropin-releasing factor,CRF)通过两种受体CRF1和CRF2调节中缝背核(dorsal raphe nucleus,DRN)-五-羟色胺(serotonin,5-HT)系统,后者已被证实在应激相关情绪疾患发病和治疗过程中发挥重要作用.已知CRF受体以相互影响相互拮抗的方式动态调节DRN-5-HT系统,提示这两种受体相对作用的调节对于协调复杂环境中DRN-5-HT系统的应激反应过程起着关键性作用.早期环境因素和遗传因素交互作用导致CRF受体的分布和反应性持续改变并造成DRN-5-HT系统反应异常,可能是导致应激反应和精神疾病易感性个体差异的重要神经基础.     

创伤后应激障碍患者的正念疗法

本文回顾了正念干预在创伤后应激障碍(PTSD)领域的应用进展,分析了正念疗法的核心内容、作用机制,创伤后应激障碍患者正念干预具体实施过程及身心干预效果。分析表明,作为辅助药物治疗方式可降低创伤后应激障碍患者创伤后应激症状阳性率,调节皮质醇水平,缓解疼痛与疲乏症状,改善认知功能障碍、心理健康及情绪调节,以提高PTSD患者正念水平及生存质量,目前对于单纯用药疗效差的PTSD患者,正念疗法作为辅助治疗手段来解决其PTSD是非常有益的尝试。     

青少年感恩与创伤后应激障碍症状的关系:社会支持和心理弹性的中介作用

在"5.12"汶川地震后18个月时,采用青少年感恩量表、社会支持评定量表、心理弹性量表和创伤后应激障碍自评量表,对都江堰地区1439名经历地震的青少年进行问卷调查,考察感恩、社会支持、心理弹性与创伤后应激障碍(PTSD)症状的关系。结果表明:(1)感恩、社会支持和心理弹性均与PTSD症状呈显著的负相关,相关系数分别为-0.18,-0.17和-0.24;(2)感恩不仅直接影响PTSD症状,而且还通过社会支持和心理弹性的部分中介作用间接影响PTSD症状,中介效应占总效应的62%。     

青少年的自我同情对创伤后应激障碍与创伤后成长的影响:感恩的中介作用

采用自我同情量表、感恩问卷、创伤后应激障碍症状核查表和创伤后成长问卷对雅安地震4.5年后的499名中学生进行调查,以考察自我同情对创伤后应激障碍(PTSD)和创伤后成长(PTG)的影响,并检验感恩在其间的中介作用。结果发现,积极自我同情可以直接负向预测PTSD、正向预测PTG,消极自我同情可以直接正向预测PTSD;积极自我同情可以通过感恩负向预测PTSD、正向预测PTG,消极自我同情可以通过感恩正向预测PTSD、负向预测PTG。研究显示,积极的自我同情可以缓解青少年的PTSD、促进PTG的发展,而消极自我同情会加重青少年的PTSD;感恩在自我同情与PTSD和PTG之间发挥了显著的中介作用。     

服刑人员创伤后应激障碍与心理健康问题的共病类型

目的：采用潜在剖面分析服刑人员创伤后应激障碍(PTSD)与心理健康问题的潜在共病类型,并探讨创伤类型对潜在类别的影响。方法：采用PTSD筛查量表和一般健康问卷对692名服刑人员进行调查。结果：(1)PTSD与心理健康问题的共病类型可分为四类,即“高PTSD-高健康问题”、“回避-一般健康问题”、“低PTSD-高健康问题”和“低PTSD-低健康问题”;(2)相比于无创伤个体,遭遇创伤个体产生心理健康问题的风险更高,部分个体还有可能产生PTSD症状;而且,遭受人际创伤还更可能导致“回避-一般健康问题”(3)男性服刑人员较高的创伤率可能导致其在“低PTSD-高健康问题”和“回避-一般健康问题”的发生风险更高。     

创伤后应激障碍的动物模型及其神经生物学机制

创伤后应激障碍是指个体由于经历对生命具有威胁的事件或严重的创伤,导致症状长期持续的精神障碍。研究创伤后应激障碍的主要动物模型为条件性恐惧和应激敏感化模型。研究表明,创伤后应激障碍中长时程留存的恐惧性记忆、高唤醒等症状与大脑杏仁核、内侧前额叶皮层和海马三个脑区及下丘脑-垂体-肾上腺轴负反馈功能增强密切相关。其中杏仁核活动增强是条件性恐惧记忆获得、保持和表达的关键神经基础。内侧前额叶皮层对杏仁核的去抑制及海马向杏仁核传递的威胁性环境信息,促进创伤后应激障碍症状的出现。在经历创伤应激后糖皮质激素受体的上调及多巴胺活动的增强是创伤后应激障碍产生的主要神经基础。对创伤后应激障碍的药物治疗研究证明多巴胺D2受体在改善患者症状中的作用比较重要,但仍需作更深入的探索     

小学生创伤后应激障碍对睡眠问题的影响:积极认知的调节作用

本研究采用创伤暴露程度问卷、儿童创伤后应激障碍症状量表、应对方式问卷和儿童行为问题核查表对汶川地震30个月后844名小学生进行调查,探讨汶川地震后小学生的创伤后应激障碍(PTSD)、积极认知与睡眠问题之间的关系。结果表明,PTSD对睡眠问题具有正向预测作用,积极认知对睡眠问题的预测作用不显著。调节效应的检验结果发现,积极认知调节着PTSD及其回避性症状对睡眠问题的影响,具体表现为PTSD及其回避性症状对睡眠问题的预测作用随着积极认知水平的增加而降低,但是积极认知分别在PTSD的闯入性症状和警觉性增高症状与睡眠问题的关系之间不起调节作用。     

青少年的情绪调节策略对创伤后应激障碍和创伤后成长的影响:社会支持的调节作用

为了考察雅安地震后青少年的情绪调节策略、社会支持与创伤后应激障碍(PTSD)和创伤后成长(PTG)之间的关系,采用创伤暴露程度问卷、情绪调节策略问卷、社会支持问卷、儿童创伤后应激障碍症状量表和创伤后成长问卷对雅安市芦山县的315名中学生进行调查,结果发现:创伤暴露程度对认知重评和表达抑制的预测作用不显著,对PTSD和PTG具有显著的正向预测作用。青少年的认知重评策略可以显著地负向预测PTSD、正向预测PTG,表达抑制策略仅对PTSD有显著的正向预测作用、对PTG的预测作用不显著;社会支持可以显著地调节表达抑制策略对PTSD和PTG的作用,表现为表达抑制对PTSD的正向预测作用随着社会支持的增加而降低,并可随着社会支持的增加而对PTG发挥促进作用。     

失独父母创伤后应激障碍症状的潜在类别及其相关因素

摘 要 研究旨在探讨失独父母创伤后应激障碍（PTSD）症状的潜在类别及相关因素,分析不同类别失独父母心理韧性的差异。采用创伤后应激障碍量表（PCL-5）、心理韧性量表对385名失独父母进行测查。结果发现：（1）失独父母PTSD症状存在三种潜在类别：PTSD高症状组（30%）、PTSD中度症状组（38%）、PTSD低症状组（32%）。（2）相比PTSD低症状组而言,PTSD高或中度症状组有显著的年龄和失独年限效应,PTSD高症状组中年龄≤60岁、失独年限<10年的人群所占比例较高;PTSD中度症状组的年龄≤60岁的人群所占比例更高。（3）PTSD高症状组心理韧性得分显著低于其他两组。应及时关注和干预小于60岁、失独年限<10年和低心理韧性的失独群体。     

The role of the glutamatergic system in posttraumatic stress disorder

Antiglutamatergic agents, such as lamotrigine, have been used successfully for the treatment of posttraumatic stress disorder (PTSD). They could be potentially acting through the stabilization of the corticotropin-releasing factor (CRF) systems. Glutamate mediates CRF release in various brain regions involved in the pathophysiology of PTSD, antiglutamatergic agents could stabilize the CRF system and, thereby, improve the symptom complex of PTSD (reexperiencing, hyperarousal, and avoidance). The role of glutamate and CRF in PTSD and other anxiety disorders are still being elucidated. However, it is clear that the glutamatergic systems play a role in the pathophysiology of PTSD.     

5-羟色胺基因缺陷增强急性应激后高唤醒状态

剧烈的应激刺激会引起持续的高唤醒状态, 是多种应激障碍的核心症状, 并推进其他症状的发生发展。本研究关注5-羟色胺在应激诱发高唤醒的发生、发展中的作用, 通过测量听觉惊吓反射水平反映高唤醒状态, 考察色氨酸羟化酶-2基因缺陷小鼠在天敌或电击应激前后高唤醒的变化。研究发现, 雄性基因缺陷小鼠在应激后出现持续一周以上的高唤醒表现, 而野生型小鼠高唤醒状态很快恢复。结果提示, 基因缺陷引起的5-羟色胺降低可能是强应激诱发的持续高唤醒的易感因素。     

Influence of adjuvant mindfulness-based cognitive therapy (MBCT) on symptoms of post-traumatic stress disorder (PTSD) in veterans – results from a randomized control study

Even 30 or more years after the end of a war, veterans can suffer from post-traumatic stress disorder (PTSD). In the present study, we explored the influence on symptoms of PTSD among Iranian veterans of the Iran–Iraq war of mindfulness-based cognitive therapy (MBCT) as add-on to a standard treatment with citalopram. Forty-eight male veterans with PTSD (mean age: 52.97 years) took part in this eight-week intervention study. Standard treatment for all patients consisted of citalopram (30–50 mg/day at therapeutic dosages). Patients were randomly assigned either to the treatment or to the control condition. Treatment involved MBCT delivered in group sessions once a week. Patients in the control condition met at the hospital with the same frequency and duration for socio-therapeutic events. At baseline and at study completion, patients completed questionnaires covering symptoms of PTSD, depression, anxiety, and stress. At study completion after eight weeks, scores for PTSD (re-experiencing events, avoidance, negative mood and cognition, hyperarousal), depression, anxiety, and stress were lower, but more so in the intervention than the control group. Data suggest that, as adjuvant to standard SSRI medication, MBCT is an effective intervention to significantly reduce symptoms of PTSD, depression, anxiety, and stress among veterans.     

Posttraumatic stress disorder symptoms, physiological reactivity, alcohol problems, and aggression among military veterans

This study examined the association between posttraumatic stress disorder (PTSD) symptomatology and aggressive behavior among a sample of male Vietnam veterans (N = 1,328). Results indicated that the hyperarousal PTSD symptom cluster evidenced the strongest positive association with aggression at the bivariate level when compared with the other PTSD symptom clusters. When the PTSD symptom clusters were examined together as predictors, hyperarousal symptoms evidenced a significant positive relationship with aggression, and avoidance/numbing symptoms were negatively associated with aggression. Examination of potential mediators indicated that hyperarousal symptoms were directly associated with aggression and indirectly related to aggression via alcohol problems. Reexperiencing symptoms were associated with aggression only indirectly and through their positive association with physiological reactivity and negative association with alcohol problems. Study results highlight the complexity of the relationship between PTSD symptoms and aggression, and suggest possible mechanisms explaining this association.     

The cycle of violence as a function of PTSD and appetitive aggression: A longitudinal study with Burundian soldiers

During deployment, soldiers face situations in which they are not only exposed to violence but also have to perpetrate it themselves. This study investigates the role of soldiers' levels of posttraumatic stress disorder (PTSD) symptoms and appetitive aggression, that is, a lust for violence, for their engaging in violence during deployment. Furthermore, factors during deployment influencing the level of PTSD symptoms and appetitive aggression after deployment were examined for a better comprehension of the maintenance of violence. Semi-structured interviews were conducted with 468 Burundian soldiers before and after a 1-year deployment to Somalia. To predict violent acts during deployment (perideployment) as well as appetitive aggression and PTSD symptom severity after deployment (postdeployment), structural equation modeling was utilized. Results showed that the number of violent acts perideployment was predicted by the level of appetitive aggression and by the severity of PTSD hyperarousal symptoms predeployment. In addition to its association with the predeployment level, appetitive aggression postdeployment was predicted by violent acts and trauma exposure perideployment as well as positively associated with unit support. PTSD symptom severity postdeployment was predicted by the severity of PTSD avoidance symptoms predeployment and trauma exposure perideployment, and negatively associated with unit support. This prospective study reveals the importance of appetitive aggression and PTSD hyperarousal symptoms for the engagement in violent acts during deployment, while simultaneously demonstrating how these phenomena may develop in mutually reinforcing cycles in a war setting.     

Posttraumatic Stress Disorder Symptom Clusters and the Interpersonal Theory of Suicide in a Large Military Sample

Prior studies examining posttraumatic stress disorder (PTSD) symptom clusters and the components of the interpersonal theory of suicide (ITS) have yielded mixed results, likely stemming in part from the use of divergent samples and measurement techniques. This study aimed to expand on these findings by utilizing a large military sample, gold standard ITS measures, and multiple PTSD factor structures. Utilizing a sample of 935 military personnel, hierarchical multiple regression analyses were used to test the association between PTSD symptom clusters and the ITS variables. Additionally, we tested for indirect effects of PTSD symptom clusters on suicidal ideation through thwarted belongingness, conditional on levels of perceived burdensomeness. Results indicated that numbing symptoms are positively associated with both perceived burdensomeness and thwarted belongingness and hyperarousal symptoms (dysphoric arousal in the 5‐factor model) are positively associated with thwarted belongingness. Results also indicated that hyperarousal symptoms (anxious arousal in the 5‐factor model) were positively associated with fearlessness about death. The positive association between PTSD symptom clusters and suicidal ideation was inconsistent and modest, with mixed support for the ITS model. Overall, these results provide further clarity regarding the association between specific PTSD symptom clusters and suicide risk factors.     

The relationships between posttraumatic stress symptom clusters and marital intimacy among war veterans

This study examined (a) the relationships between posttraumatic stress disorder (PTSD) symptom clusters and marital intimacy among Israeli war veterans and (b) the role of self-disclosure and verbal violence in mediating the effects of PTSD avoidance and hyperarousal symptoms on marital intimacy. The sample consisted of 219 participants divided into 2 groups: ex-prisoners of war (ex-POWs; N = 125) and a comparison group of veterans who fought in the same war but were not held in captivity (N = 94). Ex-POWs displayed higher levels of PTSD symptoms and verbal violence and lower levels of self-disclosure than did controls. Although ex-POWs and controls did not differ in level of marital intimacy, they did, however, present a different pattern of relationships between PTSD clusters and intimacy. In ex-POWs, self-disclosure mediated the relations between PTSD avoidance and marital intimacy. Verbal aggression was also found via indirect effect of hyperarousal on marital intimacy. The results point to the importance of self-disclosure and verbal violence as interpersonal mechanisms for the relations between posttraumatic symptoms on marital intimacy of ex-POWs.     

Associations between dimensions of anxiety sensitivity and PTSD symptom clusters in active-duty police officers

Prior studies have shown that anxiety sensitivity (AS) plays an important role in posttraumatic stress disorder (PTSD) symptom severity. The purpose of this study was to evaluate associations between empirically supported PTSD symptom clusters (i.e. reexperiencing, avoidance, numbing, hyperarousal) and AS dimensions (i.e. psychological concerns, social concerns, somatic concerns). Participants were 138 active-duty police officers (70.7% female; mean age = 38.9 years; mean time policing = 173.8 months) who, as a part of a larger study, completed measures of trauma exposure, PTSD symptoms, AS, and depressive symptoms. All participants reported experiencing at least one event that they perceived as traumatic, and 44 (31.9%) screened positive for PTSD. Officers with probable PTSD scored significantly higher on AS total as well as the somatic and psychological concerns dimensional scores than did those without PTSD. As well, a higher percentage of officers with probable PTSD scored positively on the AS-derived Brief Screen for Panic Disorder (Apfeldorf et al., 1994) compared with those without PTSD. A series of regression analyses revealed that depressive symptoms, number of reported traumas, and AS somatic concerns were significant predictors of PTSD total symptom severity as well as severity of reexperiencing. Avoidance was predicted by depressive symptoms and AS somatic concerns. Only depressive symptoms were significantly predictive of numbing and hyperarousal cluster scores. These findings contribute to understanding the nature of association between AS and PTSD symptom clusters. Implications for the treatment of individuals having PTSD with and without panic-related symptomatology are discussed.