权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of motor control of children performed by unilateral and simultaneous bilateral movements

通过单侧和同时双边运动进行儿童运动控制的发展

基本信息

批准号：
12680050
负责人：
SASAKI Reiko
金额：
$ 1.41万
依托单位：
Keio University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12680050/
关键词：
Motor development Reaction time Children Bilateral deficit Handgrip 発揮出力把握動作発達

项目摘要

Dexterous movements are based on an adequate control of several segments of the body simultaneously, with optimal timing and muscular strength. Then it is necessary to inhibit useless parts for the movement. A performance of the children at an early stage of development seems to exert their movements more facilitative rather than inhibitive. In this research, some experiments ware performed to elucidated the control mechanisms in a rapid movement (reaction time task) of children. And it could to be clarified the developmental characteristics of them.Subjects were 12 adults (aged 19-22) and 9 children (aged 5-11). All subjects ware asked to perform a reaction time task by a handgrip either by a single hand or by both hands in response to auditory stimuli. The reaction time and grip strength ware measured in each trial.The following result was obtained. In children, comparing the reaction time of unilateral with bilateral on each side (right and left), it was observed that "bilateral facilitation" phenomenon, which meant that the latency of initiation of the response from the onset of the auditory stimulus was shortened relative to unilateral response. Particularly, that was remarkably observed on non-dominant hand side or on the side in which slower response was exerted in unilateral response task. Those phenomena of children could be different from adults in which bilateral deficit was observed. It seems to occur that some facilitation rather than inhibition during the task exertion in the contralateral homologous muscle in children.

灵巧的动作是基于同时对身体的几个部分进行充分的控制，并具有最佳的时机和肌肉力量。那么就有必要抑制运动中无用的部分。儿童在发育早期的表演似乎更有利于他们的动作，而不是抑制。本研究通过一些实验来阐明儿童快速动作(反应时任务)的控制机制。研究对象为12名成人(19~22岁)和9名儿童(5~11岁)。所有受试者都被要求通过握手完成一项反应时任务，无论是单手还是双手对听觉刺激的反应。在每个实验中测量反应时间和握力。结果如下。在儿童中，比较单侧和双侧(右侧和左侧)的反应时，观察到“双侧促进”现象，即从听觉刺激开始的反应开始的潜伏期比单侧反应的潜伏期短。尤其是在单侧反应任务中，在非优势手或反应较慢的一侧被显著观察到。儿童的这些现象可能不同于观察到双侧缺陷的成人。在儿童的对侧同种肌肉中，在任务的用力过程中，似乎出现了促进而不是抑制。