Rönnefarth Maria, Bathe-Peters Rouven, Jooss Andreas, Haberbosch Linus, Scholz Michael, Schmidt Sein, Brandt Stephan A
a Department of Neurology , Charité-Universitaetsmedizin Berlin , Berlin , Germany .
b Department of Neural Information Processing, Fak IV , Technische Universitaet Berlin , Berlin , Germany.
J Mot Behav. 2019;51(4):406-415. doi: 10.1080/00222895.2018.1495172. Epub 2018 Sep 10.
To evaluate task induced motor fatigue in a well-established finger tapping task, we analyzed tapping parameters and included the time course of measures of force. We hypothesized that a decline in tapping force would reflect task induced motor fatigue, defined by a lengthening of inter-tap intervals (ITI). A secondary aim was to investigate the reliability of tapping data acquisition with the force sensor. Results show that, as expected, tapping speed decreased linearly over time, due to both an increase of ITI and tap duration. In contrast, tapping force increased non-linearly over time and was uncorrelated to changes in tapping speed. Force data could serve as a measure to characterize task induced motor fatigue. Force sensors can assess a decline in tapping speed as well as an independent increase of tapping force. We argue that the increase of force reflects central compensation, i.e. perception of fatigue, due to an increase in task effort and difficulty.
为了在一项成熟的手指敲击任务中评估任务诱发的运动疲劳，我们分析了敲击参数，并纳入了力测量的时间进程。我们假设敲击力的下降将反映任务诱发的运动疲劳，其定义为敲击间隔（ITI）的延长。第二个目的是研究使用力传感器采集敲击数据的可靠性。结果表明，正如预期的那样，由于ITI和敲击持续时间的增加，敲击速度随时间呈线性下降。相比之下，敲击力随时间呈非线性增加，且与敲击速度的变化无关。力数据可作为表征任务诱发运动疲劳的一种指标。力传感器可以评估敲击速度的下降以及敲击力的独立增加。我们认为，力的增加反映了中枢补偿，即由于任务努力和难度的增加而产生的疲劳感。
