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The volition, the mode of movement selection and the readiness potential.
Experimental Brain Research ( IF 2 ) Pub Date : 2020-07-12 , DOI: 10.1007/s00221-020-05878-9
Shiro Takashima 1 , Carolina Y Ogawa 1 , Fernando Araujo Najman 2 , Renato T Ramos 1, 3
Affiliation  

A growing body of evidence suggests that the mode of movement selection is relevant for the readiness potential, namely, internal (or free) selection of movements is associated with increased readiness potential amplitudes compared to predetermined or externally guided selection. It is little acknowledged, however, that this finding may be ascribed to the different expression of volition (i.e., conscious experience of choice) rather than to the mode of movement selection per se. To probe this issue, we conducted two experiments: in Experiment 1, a mental task was employed to distract sixteen volunteers from the selection and performance of incidental movements, which consisted of pressing one of two buttons according to either free or externally guided modes of movement selection; in Experiment 2, another sixteen individuals performed the same motor task, however, they were encouraged to attend to their intention to act. As result, the increased readiness potential amplitude before freely selected movements was found exclusively in Experiment 2. More detailed analysis suggested that the attention to the initiation of movements was associated with greater readiness potential in its medial and late portion, while the attention to the movement selection, with more global increase of the component. The study suggests that much of the higher demands on motor preparatory activities ascribed to the internal selection of movements in previous studies actually depends on individual’s attention and, thus, probably corresponds to volitional processes.



中文翻译:

意志、运动方式选择和准备潜力。

越来越多的证据表明,运动选择模式与准备潜力相关,即,与预定或外部引导的选择相比,内部(或自由)运动选择与增加的准备潜力幅度相关。然而,很少有人承认这一发现可能归因于意志的不同表达(即有意识的选择体验),而不是运动选择模式本身。为了探讨这个问题,我们进行了两个实验:在实验 1 中,采用一项心理任务来分散 16 名志愿者对附带动作的选择和执行的注意力,其中包括根据自由或外部引导的运动模式按下两个按钮之一选择;在实验 2 中,另外 16 个人执行了相同的运动任务,但是,他们被鼓励关注自己的行动意图。结果,在自由选择的运动之前增加的准备电位幅度仅在实验2中发现。更详细的分析表明,对运动开始的注意力与其中间和后期部分的更大准备电位相关,而对运动的注意与运动开始的注意力相关。选择,具有更多全局增加的组件。该研究表明,先前研究中对运动准备活动的较高要求归因于运动的内部选择,实际上取决于个人的注意力,因此可能与意志过程相对应。

更新日期:2020-07-13
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