Neurosci Biobehav Rev:精神分裂症谱系与孤独症谱系患者表现出相似多感觉时间整合缺陷

2018-03-14 佚名 中科院心理所

精神分裂症和孤独症是两种严重的神经发育性疾病,它们有很多相似的临床症状,如社会认知缺损、社交互动障碍等。最新的研究提示,这两种疾病可能处在同一个神经发育性疾病的连续体中。

精神分裂症和孤独症是两种严重的神经发育性疾病,它们有很多相似的临床症状,如社会认知缺损、社交互动障碍等。最新的研究提示,这两种疾病可能处在同一个神经发育性疾病的连续体中。

感知觉功能异常是精神分裂症和孤独症共享的重要特征之一。在精神分裂症和孤独症患者群体中,普遍存在包括视、听、触、嗅等多种感觉通道的信息加工异常,而这种低层次的感知觉功能与更高水平的情绪、社会性等功能密切相关。除了单通道的感觉加工,跨通道的感觉统合对复杂社会信息的知觉尤为重要。例如,在社交互动中,我们需要整合对方的面孔、言语、唇动、手势等多方面的信息,如果无法成功整合不同感觉通道的信息,可能会导致对社会信息的误读,进而诱发个体适应不良的社会反应。最近已有研究表明,这种跨通道的感觉整合异常在精神分裂症和孤独症谱系中都有体现,尤其是言语、社交情境中的缺损更为突出。

在感觉统合中,“时间接近性”是人们捆绑、整合相关信息的重要线索之一。如果这一时间线索变得不那么精确,或者说人们把本该分离的感觉信息整合到了一起,则意味着“时间整合窗”(Temporal binding window)的增大,进而会导致感觉信息的“过滤”异常,使得周围的环境信息变得更加模糊和难以预测。越来越多的研究发现,精神分裂症和孤独症患者都表现出时间整合窗的异常增大,但这种异常背后的具体机制及其在两种临床群体中的表现异同还鲜有研究考察,系统考察时间整合窗增大与社交、沟通障碍之间关系的研究更为少见。

近日,中国科学院心理研究所心理健康院重点实验室神经认知与应用认知神经科学实验室(NACN Lab)陈楚侨研究组完成了一项元分析,旨在定量地对已有文献进行综述,系统考察时间整合能力在精神分裂症谱系和孤独症谱系中的表现。该研究共纳入了21项研究,并有14项研究最终纳入了元分析(8篇精神分裂症谱系,6篇孤独症谱系)。研究表明,感觉时间整合能力的缺损在两类精神疾病中都普遍存在,且缺损的程度是可比的。在进一步的分析中,该研究划分出单感觉通道和多感觉通道(主要为视觉听觉双通道)两组,发现单感觉时间整合能力在孤独症患者群体中是否存在缺损仍有争议;但关于跨通道的时间整合能力上,两组病人均表现出显着的缺损。更高水平的跨通道时间整合能力在精神分裂症和孤独症谱系中存在稳定而一致的缺损,且这种缺损与幻觉、社交沟通障碍、自我知觉异常等临床症状密切相关。该研究提示,未来应开展更多研究去考察时间整合窗增大在两种神经发育性疾病中的具体表现机制。此外,由于传统药物对这种认知能力缺损的治疗效果不佳,研究者和临床工作者应发展出特定的干预手段以提高患者的跨通道时间整合能力。

相关研究成果发表在Neuroscience & Biobehavioral Reviews上。该研究得到了北京市科学与技术基金、国家基础研究项目、北京市科学与技术领军人才项目的资助。

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    2018-06-07 sunylz
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    2018-03-16 lsndxfj
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    2018-03-16 qjddjq

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精神分裂症是一种严重影响患者思维、情感和行为的常见精神疾病,目前影响了全球约1%的人口。由于病因复杂,反复发作以及大多在青壮年发病,精神分裂症严重影响患者生活,同时给患者家属和社会带来沉重负担。精神分裂症的遗传力高达0.8左右,表明遗传因素起到关键作用。目前GWAS鉴别到的绝大多数与精神分裂症显着相关的遗传变异都位于非编码区,暗示这些遗传易感位点很可能通过调控基因表达水平进而影响精神分裂症易感。

苯甲酸钠有助于精神分裂症的治疗

根据一项最新研究,常见的食品防腐剂苯甲酸钠能够改善氯氮平耐药的精神分裂症患者的症状。中国医科大学(中国台湾)的Hsien-Yuan Lane博士领导的一项随机、双盲、安慰剂对照的临床试验显示,在安定药物氯氮平中加入苯甲酸钠可改善其他药物无效的精神分裂患者的症状,这一发现为难治性精神分裂患者的治疗提供了新的选择。

Radiology:精神分裂症患者灰质在减少

本研究旨在验证精神分裂症患者结构变化的空间及因果关系,并将结果发表在radiology上。

NPJ Schi:精神分裂症新见解,人类发展的“副作用”

一项新的研究发现,精神分裂症可能是复杂的人脑发育过程中的一种“不受欢迎的副作用”。