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首页> 外文期刊>Experimental Brain Research >Timing of bimanual movements in human and non-human primates in relation to neuronal activity in primary motor cortex and supplementary motor area
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Timing of bimanual movements in human and non-human primates in relation to neuronal activity in primary motor cortex and supplementary motor area

机译：人类和非人类灵长类动物中双手运动的时间与初级运动皮层和辅助运动区神经元活动的关系

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摘要

This study investigates the timing of bimanual movements in a combined behavioral and physiological approach. Human subjects and rhesus monkeys performed the same bimanual task. In monkeys, we simultaneously recorded neuronal activity in the two hemispheres of primary motor cortex (MI) or supplementary motor area (SMA), and related it to bimanual coordination in the temporal domain. Both for monkeys and humans, the reaction times of bimanual movements never significantly exceeded the reaction times of the slower arm in unimanual movements. Consistent with this, the longest delay between neural activity onset in SMA and MI and movement initiation was observed in unimanual movements of the slower arm and not in bimanual movements. Both results suggest that the programming of bimanual movements does not require more processing time than unimanual movements. They are also consistent with the view that bimanual movements are programmed in a single process, rather than by combining two separate unimanual movement plans. In both humans and monkeys, movement initiation was highly correlated between the arms. However, once movements began, the temporal correlation between the arms progressively declined. Movement decorrelation was accompanied by a net decorrelation of neuronal population activity in MI and SMA, suggesting a functional connection between neuronal interactions and the level of bimanual coupling and decoupling. The similarity of neuronal activities in MI and SMA in relationship to behavioral timing lends support to the idea that both areas are involved in the temporal coordination of the arms.
机译：这项研究调查了行为和生理学相结合的双向运动的时间。人类对象和恒河猴执行相同的双手任务。在猴子中，我们同时记录了主要运动皮层（MI）或补充运动区（SMA）的两个半球中的神经元活动，并将其与时域的双手协调相关。无论对于猴子还是人类，双手运动的反应时间都不会显着超过单手运动中慢臂的反应时间。与此相一致，在较慢的手臂单手运动中而不是在双手运动中，观察到SMA和MI的神经活动发作与运动开始之间的最长延迟。这两个结果都表明，对双手运动进行编程不需要比单手运动更多的处理时间。它们还与以下观点相一致：双向运动是在单个过程中编程的，而不是通过组合两个单独的单向运动计划来实现的。在人类和猴子中，手臂之间的运动启动高度相关。但是，一旦开始运动，手臂之间的时间相关性就会逐渐下降。运动去相关伴随着MI和SMA中神经元种群活动的净去相关，表明神经元相互作用与双向耦合和去耦合水平之间存在功能性联系。 MI和SMA中神经元活动与行为时间的关系相似，这支持了两个区域都参与手臂的时间协调的观点。

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  • 来源
    《Experimental Brain Research》 |2002年第3期|322-335|共14页
  • 作者

    A. Gribova; O. Donchin; H. Bergman; E. Vaadia; S. Cardoso de Oliveira;

  • 作者单位

    Department of Physiology and the Interdisciplinary Center for Neural Computation The Hebrew University Hadassah Medical School;

    Department of Physiology and the Interdisciplinary Center for Neural Computation The Hebrew University Hadassah Medical SchoolDepartment of Biomedical Engineering Johns Hopkins University;

    Department of Physiology and the Interdisciplinary Center for Neural Computation The Hebrew University Hadassah Medical School;

    Department of Physiology and the Interdisciplinary Center for Neural Computation The Hebrew University Hadassah Medical School;

    Department of Physiology and the Interdisciplinary Center for Neural Computation The Hebrew University Hadassah Medical SchoolInstitut für Arbeitsphysiologie an der Universität Dortmund;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bimanual coordination; Temporal coordination; Motor psychophysics; SMA; MI;

    机译：双手协调;时间协调;运动心理物理学;SMA;MI;

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