搜索结果: 1-13 共查到“N400”相关记录13条 . 查询时间(0.046 秒)
Discourse-level semantic coherence influences beta oscillatory dynamics and the N400 during sentence comprehension
Language comprehension discourse semantics beta oscillations
2017/8/30
In this study, we used electroencephalography to investigate the influence of discourse-level semantic coherence on electrophysiological signatures of local sentence-level processing. Participants rea...
网络语言的创造性加工过程：新颖N400与LPC
网络语言 创造性思维 N400延迟效应 晚期正成分
2017/3/2
采用事件相关电位(ERP)技术比较在语义违反范式下网络语言和标准汉语的语义加工差异。结果发现：(1)不管是网络语言还是标准汉语, 相对于语义一致条件, 语义不一致条件在400 ms诱发了一个更负的负成分, 但网络语言的经典N400差异波具有更晚的潜伏期和更长的持续时间; (2)溯源结果发现, 网络语言和标准汉语的经典N400差异波的早期和晚期的定位均分别定位于丘脑和前扣带回, 表明N400延迟效应...
THE N400 IS NOT A SEMANTIC ANOMALY RESPONSE: MORE EVIDENCE FROM ADJECTIVE-NOUN COMBINATION
ANOMALY RESPONSE ADJECTIVE-NOUN COMBINATION
2015/9/2
Previous work has shown that the N400 ERP component is elicited by all words, whether
presented in isolation or in structured contexts, and that its amplitude is modulated by
semantic association ...
A cortical network for semantics: (de)constructing the N400
A cortical network N400 response
2015/9/2
Measuring event-related potentials (ERPs) has been fundamental to our
understanding of how language is encoded in the brain. One particular ERP response, the
N400 response, has been especially inf...
A lexical basis for N400 context effects: Evidence from MEG
Semantic priming Semantic anomal Prediction
2015/9/2
The electrophysiological response to words during the ‘N400’ time window (300–500 ms post-onset) is
affected by the context in which the word is presented, but whether this effect reflects the ...
Dissociating N400 Effects of Prediction from Association in Single-word Contexts
Single-word Contexts Association
2015/9/2
When a word is preceded by a supportive context such as a
semantically associated word or a strongly constraining sentence
frame, the N400 component of the ERP is reduced in amplitude.
The balance between memory and unification in semantics: A dynamic account of the N400
Semantics Neuroscience N400.
2015/4/10
At least three cognitive brain components are necessary in order for us to be
able to produce and comprehend language: a Memory repository for the
lexicon, a Unification buffer where lexical informa...
The interaction of discourse context and world knowledge in online sentence comprehension: Evidence from the N400
discourse context world knowledge
2015/3/31
In an ERP experiment we investigated how the recruitment and integration of world knowledge information relate to the integration of information within a current discourse context. Participants were p...
老年抑郁症和阿尔茨海默病的事件相关电位N400的比较研究
抑郁症 阿尔茨海默病 事件相关电位N400
2014/10/20
比较老年抑郁症(GD)和阿尔茨海默病(AD)的事件相关电位N400的差异性，寻找辅助诊断GD的新方法。方法 选择35例GD患者，40例AD患者和39例健康老人(NC)分别进行N400检测。结果 (1)三组N400潜伏期比较，Fz区、Pz区、C3区、C4区非匹配刺激潜伏期之间的差异，Pz区匹配刺激潜伏期之间的差异有统计学意义(P<0.05)。GD组N400潜伏期长于NC组，AD组N400潜伏期长于G...
脑卒中患者不同语言范式下语言认知N400的差异
脑卒中 语言认知 事件相关电位 N400
2013/3/18
目的研究脑卒中患者在不同语言范式下语言认知N400的差异，探讨脑语言认知过程。 方法分别选取20例首发单病灶脑卒中患者作为脑卒中组和20例健康体检者作为对照组，以“图片-词语”和“句子-词语”两种范式作为刺激材料，测试其语言认知过程中的N400。两种范式启动刺激分别为图片和句子，靶刺激均为词语，词语又分为动词和名词两种形式。记录2组受试者Fz、Pz、T3、T4四点N400波。比较N400差异波潜伏...
老年抑郁症认知功能与事件相关电位N400的临床研究
抑郁症 认知 诱发电位
2012/5/25
探讨缓解期老年抑郁症患者的认知功能状况与N400表现。方法 按中国精神障碍分类与诊断标准第3版(CCMD-3)中抑郁症的诊断标准，收集23例60岁以上处于缓解期的老年抑郁症患者(抑郁组),20名健康老年人(对照组)。使用汉密尔顿抑郁量表(HAMD)、简易智力状态检查(MMSE)和蒙特利尔认知评估表(MoCA)对所有入组者进行评定并作N400检测，分析它们之间的相关性及对老年抑郁症的诊断价值。 结果...
健康成人汉语成语尾字识别的事件相关脑电位N400研究
健康成人 事件相关电位 N400 结尾字
2012/11/8
目的研究汉语成语尾字匹配与非匹配事件相关脑电位（ERP）N400的变化，探讨其认知模式以及汉字认知加工特点。 方法应用国产WJ-1型ERP仪，对62名19~50岁健康成人右利手受试者，进行汉语成语正常结尾字（匹配）与汉语成语结尾歧义字（非匹配）N400检测，比较两种情况下N400波形、潜伏期和波幅，并测试实验结果的稳定性，观察性别对结果的影响。 结果①N400基本波型分布于Fz、Cz和Pz等各脑区...