Perception of combined translation and rotation in the horizontal plane in humans
Perception of combined translation and rotation in the horizontal plane in humans
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DOI：
10.1152/jn.00322.2016
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发表时间：
2016-09-01
影响因子：
2.5
通讯作者：
Crane, Benjamin T.
中科院分区：
文献类型：
--
作者：
Crane, Benjamin T.
人类运动感知的偏差和偏见被确定为偏航旋转和摇摆（左-右）和浪涌（前-后）平移，独立和组合。刺激为加速度为1Hz的正弦波，峰值速度为14度/秒或cm/s。根据先前的反应调整测试刺激，而分散注意力的刺激是恒定的。17名年龄在20岁至83岁之间的人类受试者完成了实验，并被分为两组：50岁以下和50岁以上。当与偏航旋转相结合时，摇摆和浪涌平移阈值都显著增加。旋转阈值没有显着增加的翻译的存在。偏航干扰器的存在使摇摆平移的感知显著偏差，例如在14度/s的垂直旋转期间，主观平等点（PSE）向右摇摆3.2 +/- 0.7（平均值+/- SE）cm/s。同样，在14度/s的垂直运动期间，PSE向左摆动2.9 +/- 0.7 cm/s。一个摇摆分心没有偏见的旋转知觉。当受试者被要求报告平移方向，同时改变偏航旋转轴时，在任一方向上感知平移的可能性相等的PSE为中线前方29 +/- 11 cm。这些结果表明，旋转偏向平移感知，使得当围绕头部前方的轴旋转时平移感知最小化。由于在截肢过程中平移和旋转的组合与头部前方的轴一致，这可能反映了一种机制，通过该机制，在截肢过程中发生的模式之外的运动被感知。
Thresholds and biases of human motion perception were determined for yaw rotation and sway (left-right) and surge (fore-aft) translation, independently and in combination. Stimuli were 1 Hz sinusoid in acceleration with a peak velocity of 14 degrees/s or cm/s. Test stimuli were adjusted based on prior responses, whereas the distracting stimulus was constant. Seventeen human subjects between the ages of 20 and 83 completed the experiments and were divided into 2 groups: younger and older than 50. Both sway and surge translation thresholds significantly increased when combined with yaw rotation. Rotation thresholds were not significantly increased by the presence of translation. The presence of a yaw distractor significantly biased perception of sway translation, such that during 14 degrees/s leftward rotation, the point of subjective equality (PSE) occurred with sway of 3.2 +/- 0.7 (mean +/- SE) cm/s to the right. Likewise, during 14 degrees/s rightward motion, the PSE was with sway of 2.9 +/- 0.7 cm/s to the left. A sway distractor did not bias rotation perception. When subjects were asked to report the direction of translation while varying the axis of yaw rotation, the PSE at which translation was equally likely to be perceived in either direction was 29 +/- 11 cm anterior to the midline. These results demonstrated that rotation biased translation perception, such that it is minimized when rotating about an axis anterior to the head. Since the combination of translation and rotation during ambulation is consistent with an axis anterior to the head, this may reflect a mechanism by which movements outside the pattern that occurs during ambulation are perceived.