Dahan Anat, Bennet Rotem, Reiner Miriam
Department of Education in Science and Technology, Technion Israel Institute of Technology, Haifa, Israel.
Department of Software Engineering, ORT Braude College of Engineering, Karmiel, Israel.
Front Hum Neurosci. 2019 Jul 11;13:238. doi: 10.3389/fnhum.2019.00238. eCollection 2019.
Human motor response time (RT) is determined by the matureness of the preceding neural motor planning process. In the current study, we characterize the temporal boundaries required for the motor planning process, and its impact on the overall motor RT. In particular, we contrasted short and long planning times by measuring the resulting differences in motor RTs, in an attempt to find whether an optimal planning time for minimal RT exists. Using a "Timed Response" paradigm, we presented participants with varying planning intervals prior to a requested motor response and studied their effect on the timing of initiation of the following movement. We found that, as expected, reaction time shortens as more planning time is provided, yet only until reaching a minimal RT, after which additional planning time increases the motor RT, thus creating a U-shaped behavioral function. Furthermore, since the minimal RT was found to be an individual characteristic, we suggest that there is an individual time window for motor planning.
人类运动反应时间（RT）取决于先前神经运动规划过程的成熟度。在当前研究中，我们刻画了运动规划过程所需的时间界限及其对整体运动反应时间的影响。具体而言，我们通过测量运动反应时间的差异来对比短规划时间和长规划时间，试图找出是否存在使反应时间最短的最佳规划时间。使用“定时反应”范式，我们在要求的运动反应之前向参与者呈现不同的规划间隔，并研究其对后续动作启动时间的影响。我们发现，正如预期的那样，随着规划时间的增加，反应时间会缩短，但只会缩短到达到最短反应时间为止，在此之后，额外的规划时间会增加运动反应时间，从而形成一个U形行为函数。此外，由于发现最短反应时间是个体特征，我们认为存在一个个体运动规划时间窗口。
