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首页> 外文期刊>Journal of vision >Visual motion, eye motion, and relative motion: A parametric fMRI study of functional specializations of smooth pursuit eye movement network areas
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Visual motion, eye motion, and relative motion: A parametric fMRI study of functional specializations of smooth pursuit eye movement network areas

机译：视觉运动，眼动和相对运动：平稳追踪眼球运动网络区域功能专业的参数化FMRI研究

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摘要

The ability to pursue moving objects with the eyes is vital to humans. However, it remains unclear how the brain differentiates visual object motion, smooth pursuit eye movements (SPEM), and eye movement-induced relative motion on the retina and where visual-to-oculomotor transformation takes place. To characterize functional differences of SPEM-processing cortical areas, we simultaneously measured functional magnetic resonance imaging (fMRI) and smooth pursuit to visual, oculomotor, and visuo-oculomotor stimuli varying the quantity of background dots of the stimuli. Resulting activations involved the whole visuo-oculomotor network. They varied among regions depending on the functional tasks and parametric changes of the background. Activation in many SPEM regions increased from 1 to 16 background dots but decreased at 36 dots. This could be an effect of coherent-texture perception. Putative MST area was not influenced by the amount of moving or stationary background dots. It probably participates in visuo-oculomotor transformation. Parts of the posterior parietal cortex seem specifically activated with relative motion between eye and background, but not with motion per se. This could be important for the perception of spatial references.
机译：用眼睛追求移动物体的能力对人类至关重要。然而，它仍然不明确大脑如何区分视觉对象运动，平滑的追踪眼球运动（SPEM）和眼睛运动诱导的视网膜的相对运动，并且发生视觉血管转化。为了表征Spem加工皮质区域的功能差异，我们同时测量功能磁共振成像（FMRI），并使视觉，动血剂和Visuo-oculomotor刺激的平滑追求变化了刺激的背景点的数量。产生的激活涉及整个Visuo-oculomotor网络。它们在区域之间变化，具体取决于功能的功能任务和背景的参数变化。许多距离区域的激活从1到16个背景点增加，但在36个点处减少。这可能是相干纹理感知的效果。推定的MST区域不会受到移动或固定背景点的影响。它可能参与Visuo-oculomotor转化。后棱镜皮质的部分似乎是专门激活的眼睛和背景之间的相对运动，但不是运动本身。这对于对空间参考的感知来说可能是重要的。

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