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An fMRI examination of the neural processing of periodic motion trajectories

机译：周期性运动轨迹的神经处理的fMRI检查

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Abstract Abstract: Abstract?? Perception of periodic or closed-circuit motion trajectories plays a crucial role in our ability to learn and perform many common skilled actions. For example, periodic trajectories are a key component of many types of biological movements when viewed relative to body translation. In the current fMRI study, we used a novel visual stimulus consisting of a target moving along a closed trajectory defined by a radial frequency (RF) pattern (i.e., a sinusoidal variation of trajectory radius relative to a circular trajectory) to determine which brain regions encode these periodic movement paths. Multivoxel pattern analyses permitted prediction of the shapes of different periodic trajectories within regions V2 and V3 indicating that these regions play a role in the processing of periodic visual motion. In addition, blood oxygen level dependent (BOLD) responses associated with the presentation of targets moving along RF trajectories compared with nonperiodic motion and static RF shapes revealed significantly greater activity in visual areas V1, V2, V3, V3A, and V4. To our knowledge, the results of this study represent the first examination of the functional brain activity underlying periodic motion processing and should inform further study.
机译：摘要摘要：摘要？对周期性或闭路运动轨迹的感知在我们学习和执行许多常见的熟练动作的能力中起着至关重要的作用。例如，相对于身体平移来看，周期性轨迹是许多类型的生物运动的关键组成部分。在当前的功能磁共振成像研究中，我们使用了一种新颖的视觉刺激，该刺激由沿着由径向频率（RF）模式（即，相对于圆形轨迹的轨迹半径的正弦变化）定义的闭合轨迹移动的目标组成对这些周期性运动路径进行编码。多体素模式分析允许预测区域V2和V3中不同周期性轨迹的形状，表明这些区域在周期性视觉运动的处理中起作用。此外，与非周期性运动和静态RF形状相比，与沿RF轨迹移动的目标的呈现相关的依赖于血氧水平的（BOLD）响应显示出在视觉区域V1，V2，V3，V3A和V4中具有明显更高的活动性。据我们所知，这项研究的结果代表了对周期性运动处理基础的功能性大脑活动的首次检查，应该为进一步的研究提供依据。

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