1 Schizophr. Res. 2005 Mar 73: 311-8
PMID 15653276
Title M50 sensory gating predicts negative symptoms in schizophrenia.
Abstract 听觉感官受损被认为是精神分裂症以及该疾病固有的信息处理缺陷的标志。负面症状的优势也反映了精神分裂症并且与较差的前食物前功能,较低的智商和较差的结果有关。但是,听觉感觉门控与负面症状之间的一致关系精神分裂症has yet to be demonstrated. The absence of such a finding is surprising, since both impaired auditory gating and negative symptoms have been linked with impaired fronto-temporal cortical function. The present study measured auditory gating using the P50 event related potential (ERP) in a paired-click paradigm and capitalized on the relative localization advantage of magnetoencephalography (MEG) to assess auditory sensory gating in terms of the event related field (ERF)M50源偶极子上的双侧颞上回(STG)。主要假设是,侧向M50听觉感觉门控件与患者的负面症状之间将存在正相关精神分裂症。在同时脑电图和MEG数据收集期间使用了标准的配对范式来确定两种神经影像学技术的20名患者组中的S2/S1感觉门控率。对参与者进行负面症状评估(SANS),正症状和负面症状量表(PANSS)以及卡尔加里抑郁量表的评估时间表精神分裂症。与以前的报告一致,ERP P50感觉门控和负面症状之间没有关系。但是,右(不是左)半球ERFM50 sensory gating ratio was significantly and positively correlated with negative symptoms. This finding is compatible with information processing theories of negative symptoms and with more recent findings of fronto-temporal abnormality in patients with predominantly negative symptoms.
SCZ Keywords 精神分裂症
2 NeuroImage Clin 2013 -1 2:695-702
PMID 24179821
Title 精神分裂症的额叶和上等听觉处理异常。
Abstract 尽管磁脑电图(MEG)研究表明,颞回(STG)的听觉处理异常精神分裂症at 50 and 100�ms, EEG and corticography studies suggest involvement of additional brain areas (e.g., frontal areas) during this interval. Study goals were to identify 30 to 130�ms auditory encoding processes in精神分裂症(SZ) and healthy controls (HC) and group differences throughout the cortex.
The standard paired-click task was administered to 19 SZ and 21 HC subjects during MEG recording. Vector-based Spatial-temporal Analysis using L1-minimum-norm (VESTAL) provided 4D maps of activity from 30 to 130�ms. Within-group t-tests compared post-stimulus 50�ms and 100�ms activity to baseline. Between-group t-tests examined 50 and 100�ms group differences.
在两组中都观察到双侧50和100 mS STG活性。HC的双侧50和100ms STG活性比SZ更强。除了STG组差异外,两组还观察到非STG活性。例如,尽管HC比SZ具有更强的左右下额回活性,但SZ的右上流回和左上角的右额回活性高于HC。
Less STG activity was observed in SZ than HC, indicating encoding problems in SZ. Yet auditory encoding abnormalities are not specific to STG, as group differences were observed in frontal and SMG areas. Thus, present findings indicate that individuals with SZ show abnormalities in multiple nodes of a concurrently activated auditory network.
SCZ Keywords 精神分裂症
3 j . Neurosci. 2014 Apr 34: 5909-17
PMID 24760850
Title 事件相关场的源重建揭示了抗精神病药物质,第一集精神分裂症患者在Mooney Face处理过程中的性能和功能障碍。
Abstract 精神分裂症以神经回路中的功能障碍为特征,可以通过电生理方法(例如脑电图和梅格)进行研究。在目前的人类研究中,我们检查了与事件相关的领域(ERFs),在药物药物的样本中精神分裂症(FE-SCZ)患者(n = 14)和健康对照参与者(n = 17)在感知穆尼面前,以研究神经磁反应的完整性及其依赖经验的修饰。ERF在传感器和源水平上分析了M100,M170和M250组件的响应。此外,我们分析了由于刺激重复而引起的峰潜伏期和适应效应。FE-SCZ患者的特征是感觉处理显着受损,如降低的歧视指数(a')所示。在传感器水平上,Fe-SCZ中的M100和M170响应在正常范围内,而M250响应受损。然而,来源定位显示,在Fe-SCZ中,M100和M170的活动广泛升高,M100和M250响应的峰值延迟延迟。另外,Fe-SCZ中的M170源活性不受刺激重复的调节。目前的发现表明,Fe-SCZ中的神经回路的特征是激发和抑制之间的平衡受到干扰,这可能导致无法进行栅极信息流动和活性异常的扩散,这与功能障碍的谷氨酸能神经传递兼容。
SCZ Keywords 精神分裂症
4 科学杂志2016年132年5月:175 - 89
PMID 26921713
Title Dynamic causal modelling of eye movements during pursuit: Confirming precision-encoding in V1 using MEG.
Abstract 本文表明,有可能估计动眼运动过程中贝叶斯信念的主观精度(逆差异)。受试者认为正弦靶标,有或没有随机波动的运动。同时记录眼睛轨迹和磁脑摄影(MEG)数据。该目标被定期遮挡,以使其重新出现引起视觉诱发的响应场(ERF)。动态因果建模(DCM)用于拟合眼轨迹的模型和ERFs。追求的DCM基于预测性编码和主动推断,并根据受试者(主观的)贝叶斯对目标(和眼睛)运动的信念来预测受试者的眼睛运动。这些层次信念的精度可以从行为(追求)数据中推断出来。MEG数据的DCM使用了已建立的神经元活性的生物物理模型,其中包括获得SUP的参数ERFicial pyramidal cells, which is thought to encode precision at the neuronal level. Previous studies (using DCM of pursuit data) suggest that noisy target motion increases subjective precision at the sensory level: i.e., subjects attend more to the target's sensory attributes. We compared (noisy motion-induced) changes in the synaptic gain based on the modelling of MEG data to changes in subjective precision estimated using the pursuit data. We demonstrate that imprecise target motion increases the gain of supERFV1(跨受试者)中的叶片锥体细胞。此外,感觉精度的增加 - 由我们的行为DCM推断 - 与受试者跨受试者的V1增益的增加相关。这是迈向大脑计算,皮质反应和行为的完全集成模型的一步精神分裂症
SCZ Keywords 精神分裂症
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