Online control of reaching and pointing to visual, auditory, and multimodal targets: Effects of target modality and method of determining correction latency.
Online control of reaching and pointing to visual, auditory, and multimodal targets: Effects of target modality and method of determining correction latency.
复制标题
在线控制到达和指向视觉、听觉和多模态目标：目标模态的影响和确定校正延迟的方法。
DOI：
10.1016/j.visres.2015.08.019
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发表时间：
2015
期刊：
影响因子：
1.8
通讯作者：
Holmes NP
中科院分区：
文献类型：
--
作者：
Holmes NP
当对象移动时，有时必须调整朝向对象的移动。这些在线调整可能非常迅速，只需100毫秒。人们对视觉运动的在线控制的潜伏期和神经基础比对听觉目标物体的了解更多。我们研究了到达视觉和听觉目标的到达点运动的在线校正的潜伏期，这些目标可能在运动开始时改变一侧和/或通道。视觉或听觉目标被呈现在左侧或右侧，参与者被指示以尽可能快和尽可能准确的速度到达并指向它们。在一半的试验中，目标在运动开始时改变了方向，参与者必须纠正他们的运动，以尽快指向新的目标位置。给出了不同的已发表的测量运动矫正潜伏期的方法，我们系统地检查了几种不同的方法。我们在这里描述的最佳方法包括将直线模型与校正运动的速度进行拟合，而不是使用统计标准来确定校正开始。在多通道实验中，这些模型拟合方法产生的纠正远离听觉目标的动作的潜伏期显著低于远离视觉目标的动作校正潜伏期。我们的结果证实了听觉目标的快速在线校正是可能的，但还需要进一步的工作来确定到达和指向运动的潜在控制系统是否对听觉和视觉目标相同。
Movements aimed towards objects occasionally have to be adjusted when the object moves. These online adjustments can be very rapid, occurring in as little as 100 ms. More is known about the latency and neural basis of online control of movements to visual than to auditory target objects. We examined the latency of online corrections in reaching-to-point movements to visual and auditory targets that could change side and/or modality at movement onset. Visual or auditory targets were presented on the left or right sides, and participants were instructed to reach and point to them as quickly and as accurately as possible. On half of the trials, the targets changed side at movement onset, and participants had to correct their movements to point to the new target location as quickly as possible. Given different published approaches to measuring the latency for initiating movement corrections, we examined several different methods systematically. What we describe here as the optimal methods involved fitting a straight-line model to the velocity of the correction movement, rather than using a statistical criterion to determine correction onset. In the multimodal experiment, these model-fitting methods produced significantly lower latencies for correcting movements away from the auditory targets than away from the visual targets. Our results confirm that rapid online correction is possible for auditory targets, but further work is required to determine whether the underlying control system for reaching and pointing movements is the same for auditory and visual targets.