A coordinate system for visual motion perception.
A coordinate system for visual motion perception.
复制标题
视觉运动感知的坐标系。
DOI：
10.1007/s002210100866
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Pizzimenti,MA
中科院分区：
文献类型：
--
作者：
Darling,WG;Pizzimenti,MA
本研究的目的是确定视觉系统在知觉水平上指定物体运动方向的参考轴。十个年轻的成年人在一个黑暗的房间里操作时，将计算机显示器上移动的发光点的运动与身体固定和外部垂直和水平平面轴对齐。在一个实验中，在垂直额面显示器上测试了将点运动对准地球固定垂直方向、不同方向的显示发光线（外部视轴）以及头部和躯干纵轴的准确性。在第二个实验中，点的运动被对准头部和躯干前/后（A-P）轴和外部视轴上的水平计算机屏幕上。当测试垂直平面轴时，头部和躯干方向在额状面（左/右倾斜）中变化，当测试水平平面轴时，头部和/或躯干绕垂直轴旋转。感知误差最低时，对准地球固定垂直在垂直平面和外部斜线在水平面时，头部和躯干的方向是不同的。水平平面运动方向的感知是准确的相对于躯干固定的A-P轴时，只有头部方向是不同的，但大的错误时，躯干方向是不同的。本体感觉的运动方向的视觉感知的影响所示的依赖性的感知误差的躯干和颈部的方向时，对齐所有的轴。此外，当对齐运动到外部线，除了躯干和颈部的方向，误差取决于线的方向，但不是当对齐到内在的轴或地球固定的垂直存在的外部线。我们的结论是，视觉运动系统定义方向相对于地球固定的垂直和外部水平参考轴时可用。如果躯干保持中性方向，则躯干固定A-P轴可用于在没有外部参考的情况下精确定义运动方向。
The purpose of this research was to determine the reference axes used by the visual system to specify direction of motion of objects by the visual system at the perceptual level. Ten young adults aligned motion of a moving luminous dot on a computer display to body-fixed and external vertical and horizontal plane axes while operating in a dark room. Accuracy of aligning dot motion to earth-fixed vertical, a displayed luminous line (external visual axis) of varied orientations, and head and trunk longitudinal axes was tested in one experiment with the display in the vertical frontal plane. In a second experiment, dot motion was aligned to head and trunk anterior/posterior (A-P) axes and to an external visual axis presented on a horizontal computer screen. Head and trunk orientations were varied in the frontal plane (left/right tilt) when testing vertical plane axes and by rotation of the head and/or trunk about a vertical axis when testing horizontal plane axes. Perceptual errors were lowest when aligning to earth-fixed vertical in the vertical plane and to an external oblique line in the horizontal plane when head and trunk orientations were varied. Perceptions of horizontal plane motion direction were accurate relative to the trunk-fixed A-P axis when only head orientation was varied, but large errors were made when trunk orientation was varied. Proprioceptive influences on visual perceptions of motion direction were shown by a dependence of perceptual errors on trunk and neck orientations when aligning to all axes. Furthermore, when aligning motion to an external line, the errors depended on orientation of the line in addition to trunk and neck orientations, but not when aligning to intrinsic axes or earth-fixed vertical in the presence of an external line. We conclude that the visual motion system defines direction relative to earth-fixed vertical and an external horizontal reference axis when available. The trunk-fixed A-P axis can be used to accurately define motion direction when operating without an external reference if a neutral trunk orientation is maintained.