在学习有节奏的双臂任务时,在左右M1上应用双侧tDCS会产生不对称的训练和保持效果。

IF 1.7 4区 医学 Q4 NEUROSCIENCES
Austin T McCulloch, David L Wright, John J Buchanan
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引用次数: 0

摘要

许多运动技能需要手臂之间的精确协调才能完成。使用经颅直流电刺激(tDCS)有助于揭示半球对双手技能的贡献。在这项研究中,使用了三个双侧蒙太奇来探索半球对有节奏的双手技能的贡献:阳极左M1/阴极右M1 (LARC),阳极右M1/阴极左M1 (RALC)和假手术。在训练过程中,刺激持续20分钟。训练后6小时检测记忆力。参与者(n = 46)学习了一种双手90°相对相位模式,在自我选择的运动频率下,每只手臂的半周期运动幅度目标为12厘米。与LARC相比,RALC在90°模式下出现更早的协调变异性,但在性能精度上没有差异。与假手术相比,LARC训练中出现了更大的运动幅度,但与RALC相比没有。延迟6小时后,tDCS蒙太奇对90°模式的协调变异性和准确性没有影响。蒙太奇与延迟运动振幅效应有关,在LARC中出现的振幅比RALC和假手术大。在训练和保持过程中观察到的不对称性来自于右撇子个体中tDCS和左半球在控制双手运动中的作用之间的相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Application of bilateral tDCS over left and right M1 produces asymmetric training and retention effects when learning a rhythmic bimanual task.

Many motor skills require precise coordination between the arms to accomplish. The use of transcranial direct current stimulation (tDCS) has helped to reveal hemispheric contributions to bimanual skills. In this study, three bilateral montages were used to explore hemispheric contributions to a rhythmic bimanual skill: anode left M1/cathode right M1 (LARC), anode right M1/cathode left M1 (RALC), and sham. Stimulation lasted 20-minutes during training. Retention was examined 6-hr after training. Participants (n = 46) learned a bimanual 90° relative-phase pattern with a half-cycle movement amplitude goal of 12 cm per arm at self-selected movement frequencies. Greater coordination variability in the 90° pattern emerged early under RALC compared to LARC, with no difference in performance accuracy. Larger movement amplitudes emerged in training with LARC compared to sham but not compared to RALC. tDCS montage had no impact on coordination variability and accuracy of the 90° pattern after the 6-hr delay. Montage was associated with a delayed movement amplitude effect emerging in retention, with larger amplitudes in LARC compared to RALC and sham. The asymmetries observed across training and retention emerged from of an interaction between tDCS and the left-hemisphere's role in the control of bimanual movements in right-handed individuals.

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来源期刊
CiteScore
3.60
自引率
5.00%
发文量
228
审稿时长
1 months
期刊介绍: Founded in 1966, Experimental Brain Research publishes original contributions on many aspects of experimental research of the central and peripheral nervous system. The focus is on molecular, physiology, behavior, neurochemistry, developmental, cellular and molecular neurobiology, and experimental pathology relevant to general problems of cerebral function. The journal publishes original papers, reviews, and mini-reviews.
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