Visual and vestibular factors influencing vestibular “navigation”
Visual and vestibular factors influencing vestibular “navigation”
复制标题
影响前庭“导航”的视觉和前庭因素
作者：
I. Israel;A. Bronstein;R. Kanayama;M. Faldon;M. Gresty
为了阐明“起点”在路径整合中的作用，正常受试者在绕地球垂直轴旋转的电动转盘上进行了自我旋转任务。他们被动地旋转（“刺激”），并必须返回到起点，通过操纵杆控制转盘的方向和速度（“反应”）。该测试包括以地面固定目标（EFT）作为起始点的条件，在刺激之前显示，以及没有EFT呈现的条件。实验对象的反应总是在完全黑暗中进行。受试者在所有条件下均成功返回起点，但EFT比其他条件下更精确（即反应变异性更小）。在后面这些任务中，较大的数据分散（不准确性）与返回峰值速度直接相关，而EFT的返回运动的幅度和速度之间没有关系。这些结果表明，演示的起始点（EFT）允许一个真实的时间积分发生，从而提高在黑暗中的自控运动的准确性。五名受试者也进行了测试，在完全黑暗中相同的旋转范例，但在刺激和反应运动的头部在不同的位置。因此，在刺激和反应期间，通过不同的半规管进行运动检测。所用的条件是在刺激期间头部直立，在响应运动期间向后过度伸展，以及在刺激期间头部向后并在响应运动期间直立。结果发现，在这些任务的准确性没有不同的刺激/响应运动期间，在直立或向后的头部位置没有变化。这些数据表明，估计的轨迹，在一定范围内，独立的运河平面。
In order to elucidate the role of the “starting point” in path integration, normal subjects underwent a self-rotational task in a motor-driven turntable rotating around an earth-vertical axis. They were passively rotated (“stimulus”) and had to return to the starting point, controlling the direction and velocity of the turntable by means of a joystick (“response”). The test included conditions with an earth-fixed target (EFT) as starting point, shown before the stimulus, and conditions without EFT presentation. The subject's response always took place in total darkness. Subjects succeeded in returning to the starting point in all conditions but were more precise (i.e. had smaller variability of responses) with the EFT than in the other conditions. The larger data scatter (inaccuracy) in these latter tasks was directly related to the return peak velocity, whereas with EFT there was no relationship between amplitude and velocity of the return motion. These results suggest that the presentation of the starting point (the EFT) allows a real time integration to take place, thereby improving accuracy during self-controlled motion in the dark. Five subjects were also tested with the same rotational paradigm in total darkness throughout, but with the head in a different position during stimulus and response motions. Thus, motion detection was performed by different semicircular canals during stimulus and response. The conditions used were head upright during stimulus, hyper-extended backward during response motion, and head backward during stimulus and upright during response motion. It was found that the accuracy during these tasks did not differ from that during stimulus/response motion without change in the upright or backward head position. These data indicate that estimates of trajectory are, within limits, independent of canal plane.
大鼠头部方向细胞优先使用地标导航系统。
影响因子：
1.9
作者：
Goodridge,JP;Taube,JS
通讯作者：
Taube,JS