Different planning policies for the initial movement velocity depending on whether the known uncertainty is in the cursor or in the target: Motor planning in situations where two potential movement distances exist.
Different planning policies for the initial movement velocity depending on whether the known uncertainty is in the cursor or in the target: Motor planning in situations where two potential movement distances exist.
复制标题
DOI：
10.1371/journal.pone.0265943
复制
发表时间：
2022
期刊：
影响因子：
3.7
通讯作者：
Kudo K
中科院分区：
文献类型：
--
作者：
Onagawa R;Mukai K;Kudo K
在目标导向行为中，个体可能需要在决定最终目标之前开始运动。以前的研究集中在初始运动方向的情况下，涉及多个目标在不同的方向从起始位置，并已表明，该运动是在目标方向之间的平均方向发起。然而，以前的研究只包括在等距离的目标的情况下，在不同的潜在距离的多种运动可能性的情况下的运动规划的特点是不清楚的。在这种情况下，运动速度是另一个重要的控制变量。此外，虽然先前的研究检查了具有不确定的运动目标位置的情况，但是不确定性也可以存在于效应器位置（例如，主体或工具位置）。因此，我们研究了（1）在涉及具有不同距离的两个潜在移动的情况下，在执行期间的初始移动速度中是否确认了平均输出。此外，我们检查了（2）移动速度的规划是否可以根据光标或目标中的不确定性的存在而不同。在主要条件下，参与者被要求开始一个具有两个潜在移动距离的伸展运动;在双光标条件下，在试验开始前呈现两个光标，在双目标条件下，呈现两个目标。作为控制条件，还执行对应于每个主条件的距离条件。在控制条件下，初始运动速度随距离线性变化。然后，我们测试了在具有两个潜在移动距离的情况下，初始移动速度是否会遵循相应控制条件的平均输出。结果表明，双目标条件下的初始运动速度比平均输出慢，而双光标条件下的初始运动速度接近平均输出。这些结果表明，目标导向的运动的速度分布不是简单地平均在两个潜在的目标存在的情况下，并且有一个不同的初始运动的规划策略取决于是否已知的不确定性是运动目标或效应器。
During goal-directed behaviors, individuals can be required to start a movement before deciding on the final goal. Previous studies have focused on the initial movement direction in situations involving multiple targets in different directions from the starting position and have shown that the movement is initiated in the average direction among the target directions. However, the previous studies only included situations with targets at equivalent distances, and the characteristics of motor planning in situations with multiple movement possibilities over different potential distances are unclear. In such situations, movement velocity is another important control variable. Furthermore, while previous studies examined situations with an uncertain motor target position, uncertainty can also exist in the effector position (e.g., body or tool locations). Therefore, we examined (1) whether the average output is confirmed in the initial movement velocity during execution in situations involving two potential movements with different distances. In addition, we examined (2) whether planning of the movement velocity can differ depending on the presence of uncertainty in the cursor or the target. In the main conditions, the participants were required to start a reaching movement with two potential movement distances; in the two-cursor condition, two cursors were presented before the start of the trial, and in the two-target condition, two targets were presented. As a control condition, a distance condition corresponding to each main condition was also performed. In the control condition, the initial movement velocity varied linearly with distance. Then, we tested whether the initial movement velocity in situations with two potential movement distances would follow the averaging output of the corresponding control condition. The results revealed that while the initial movement velocity in the two-target condition was slower than the averaging output, that in the two-cursor condition approached the averaging output. These results suggest that the velocity profile of the goal-directed movement is not simply averaged in a situation where two potential targets exist, and that there is a difference in the planning policy of the initial movement depending on whether the known uncertainty is for the movement goal or the effector.
登录
查看更多内容
影响因子：
25
作者：
Gallivan JP;Logan L;Wolpert DM;Flanagan JR
通讯作者：
Flanagan JR
影响因子：
64.8
作者：
Harris, CM;Wolpert, DM
通讯作者：
Wolpert, DM
影响因子：
3.8
作者：
Krueger, Melanie;Hermsdoerfer, Joachim
通讯作者：
Hermsdoerfer, Joachim
影响因子：
3.4
作者：
Hesse, Constanze;Kangur, Karina;Hunt, Amelia R.
通讯作者：
Hunt, Amelia R.
影响因子：
4.3
作者：
Christopoulos V;Bonaiuto J;Andersen RA
通讯作者：
Andersen RA