Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, University of A Coruna, Motor Control Group, A Coruña, Spain.
Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, Grioningen, The Netherlands; Institute of Sport Sciences and Physical Education, Faculty of Sciences, University of Pécs, Pécs, Hungary; Somogy County Kaposi Mór Teaching Hospital, Kaposvár, Hungary.
Neurosci Lett. 2022 Jun 21;782:136691. doi: 10.1016/j.neulet.2022.136691. Epub 2022 May 20.
Anodal transcranial direct current stimulation (tDCS) can enhance the retention of a previously practiced motor skill. However, the effects of tDCS on the performance of the choice reaction time task are not fully understood. We examined the effects of anodal tDCS over the left primary motor cortex (M1) on the retention of a 4-choice visual-motor reaction time task (4-ChRT). Right-handed healthy participants (n = 100) were randomly assigned to five groups: three groups received anodal tDCS: before (tDCS), during (tDCS), or after (tDCS) motor practice. In addition, there were two control groups: with (CON) and without (CON) motor practice. We evaluated the speed and precision of the 4-ChRT task before (PRE), during, and 24 h (POST) after the interventions. All groups, including the non-stimulation (CON) and non-practice groups (CON), improved (p < 0.05) motor retention (Δ4-ChRT: 35.8 ± 36.0 ms). These findings suggest that the tDCS effects over M1 may differ for serial versus choice RT tasks, perhaps due to the different brain areas involved in each motor task.
经颅直流电刺激（tDCS）阳极刺激可以增强之前练习过的运动技能的保持。然而，tDCS 对选择反应时任务的影响尚不完全清楚。我们研究了左初级运动皮层（M1）阳极 tDCS 对 4 选择视觉运动反应时任务（4-ChRT）的保持的影响。右利手健康参与者（n=100）被随机分配到五个组：三组接受阳极 tDCS：运动前（tDCS）、运动中（tDCS）或运动后（tDCS）。此外，还有两个对照组：有（CON）和无（CON）运动练习。我们在干预前（PRE）、干预中（DUR）和 24 小时后（POST）评估了 4-ChRT 任务的速度和精度。所有组，包括非刺激（CON）和非练习组（CON），运动保持都有所提高（p<0.05）（Δ4-ChRT：35.8±36.0ms）。这些发现表明，M1 上的 tDCS 效应可能因串行与选择 RT 任务而异，这可能是由于每种运动任务涉及的不同脑区所致。
