[Late negativity in visual event-related potentials in humans to changes in topology of simple nonverbal stimuli].

A Ia Kaplan, E V Levichkina
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Abstract

Late negativity arising in ERP in response to a semantic mismatch of consistently presented stimuli is usually considered to be related with verbal or symbolic representation of stimulus during perception. It is shown in this work that the late negativity typical of the semantic mismatch develops even in the context of non-symbolic and nonverbal, for example, four-point stimulus compositions which differ only in typology or angular size. Attention distraction from trial stimuli completely eliminates the effect of the late negativity. It is suggested that the brain finds semantic and formal (physical) descriptions for any stimulus composition. This phenomenon is reflected in the N400 amplitude depending on the attention volume to the stimuli per se.

[人类视觉事件相关电位对简单非语言刺激拓扑结构变化的晚期消极性]。
在一致呈现的刺激语义不匹配的情况下,ERP中出现的后期负性反应通常被认为与知觉过程中刺激的言语或符号表征有关。这项研究表明,即使在非符号和非语言的背景下,例如,仅在类型或角度大小上不同的四点刺激组合,语义不匹配的晚期否定性也会发展。从试验刺激中分散注意力完全消除了后期消极情绪的影响。这表明,大脑为任何刺激成分找到语义和形式(物理)描述。这种现象反映在N400振幅上,这取决于对刺激本身的注意量。
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