The visual motion aftereffect (MAE) is the most prominent aftereffect in the visual system. Regarding its function, psychophysical studies suggest its function to be a form of sensory error correction, possibly also triggered by incongruent visual-vestibular stimulation. Several observational imaging experiments have deducted an essential role for region MT+ in the perception of a visual MAE but not provided conclusive evidence. Potential confounders with the MAE such as ocular motor performance, attention, and vection sensations have also never been controlled for. Aim of this neuroimaging study was to delineate the neural correlates of MAE and its subjacent functional connectivity pattern. A rotational MAE (n = 22) was induced using differing visual stimuli whilst modulating ocular motor parameters in a 3T scanner. Data was analyzed with SPM12. Eye movements as a response to the same stimuli were studied by means of high-resolution videooculography. Analysis for all stimuli gave bilateral activations along the dorsal visual stream with an emphasis on area MT. The onset of a visual MAE revealed an additional response in the right medial superior temporal area (MST) and a concurrent deactivation of vestibular hub region OP2. There was no correlation for the BOLD effects during the MAE with either ocular motor or attention parameters. The functional correlate of a visual MAE in humans may be represented in the interaction between region MT and area MST. This MAE representation is independent of a potential afternystagmus, attention and the presence of egomotion sensations. Connectivity analyses showed that in the event of conflicting visual-vestibular motion information (here MAE) area MST and area OP2 may act as the relevant mediating network hubs.

译文

视觉运动后效 (MAE) 是视觉系统中最突出的后效。关于其功能,心理物理研究表明其功能是感觉错误校正的一种形式,也可能是由不一致的视觉前庭刺激触发的。几项观测成像实验已扣除了MT区域在视觉MAE感知中的重要作用,但未提供确凿的证据。与MAE的潜在混杂因素,例如眼部运动性能,注意力和视觉感觉,也从未得到控制。这项神经影像学研究的目的是描述MAE及其以下功能连接模式的神经相关性。在3t扫描仪中调节眼球运动参数的同时,使用不同的视觉刺激诱导旋转MAE (n   =   22)。数据用spm12进行分析。通过高分辨率视频眼电图研究了眼动作为对相同刺激的反应。对所有刺激的分析都沿背侧视觉流进行了双边激活,重点是MT区域。视觉MAE的发作揭示了右内侧上颞区 (MST) 的额外反应以及前庭中枢区op2的同时失活。MAE期间的BOLD效应与眼部运动或注意力参数均无相关性。人类视觉MAE的功能相关性可以在区域MT和区域MST之间的相互作用中表示。这种MAE表示与潜在的眼震,注意力和运动感觉的存在无关。连通性分析表明,如果视觉-前庭运动信息 (此处为MAE) 发生冲突,则MST和OP2区域可能充当相关的中介网络集线器。

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