Berti Stefan
Department of Psychology, Johannes Gutenberg-University Mainz, Wallstraße 3, D-55099, Mainz, Germany.
Neurosci Lett. 2018 Apr 13;672:113-117. doi: 10.1016/j.neulet.2018.02.030. Epub 2018 Feb 21.
The visual mismatch negativity (vMMN) is a component of the human event-related brain potential (ERP) that indicates the automatic processing and detection of changes in the visual sensory input. The study tested whether the vMMN was observable when the visual input is restricted to one visual hemifield and, with this, only para-foveal input to one of the two primary sensory cortices in the visual system is available for stimulus processing. The vMMN was elicited by the stimulation restricted to a small portion of the visual field. This demonstrates that in general vMMN elicitation is not confined to stimulations covering a broad range of the visual field or to the propagation of sensory information to both sensory visual cortices. In addition, the vMMN amplitudes showed a high variability between the different conditions, including non-significant vMMN amplitudes. This suggests that pronounced vMMNs observed in experimental settings relies on salient visual stimuli covering different channels of sensory information in vision.
视觉失匹配负波（vMMN）是人类事件相关脑电位（ERP）的一个组成部分，它表明视觉感觉输入变化的自动处理和检测。该研究测试了当视觉输入仅限于一个视觉半视野时，vMMN是否可观察到，由此，视觉系统中两个主要感觉皮层之一仅能获得旁中央凹输入用于刺激处理。vMMN由局限于视野一小部分的刺激诱发。这表明一般来说，vMMN的诱发并不局限于覆盖广泛视野范围的刺激，也不局限于感觉信息向两个视觉感觉皮层的传播。此外，vMMN波幅在不同条件下表现出高度变异性，包括无显著意义的vMMN波幅。这表明在实验环境中观察到的明显vMMN依赖于覆盖视觉中不同感觉信息通道的显著视觉刺激。
