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Influence of movement onset prediction and postural control preparation on postural muscle activity associated with upper limb movement

运动起始预测和姿势控制准备对与上肢运动相关的姿势肌肉活动的影响

基本信息

批准号：
15500436
负责人：
FUJIWARA Katsuo
金额：
$ 2.11万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

Many previous studies have found that the activation onset in the postural muscles of the legs and trunk that control standing postures precedes that in the focal muscles that rapidly move the arms. Based on the previous researches, we presumed that when the initiation of movement is easy to predict and the preparation for postural control is adequate, the preceding activation of postural muscles will be facilitated.Relationship between uncertainty of go signal taming and evoked brain potential was examined using event related potential (P300) during odd-ball paradigm with auditory stimulation. Reaction task was conducted under the various preparatory periods between warning signal and go signal, and contingent negative variation (CNV) was analyzed.The amplitude of P300 was significantly large in the stimulation presentation probability 15% compared with 45%. The reaction time of the anterior deltoid to the sound stimulation was significantly earlier in 45% probability than in 15% probability. The activation onset of the erecter spinae and gastrocnemius to the anterior deltoid were earlier in 45% probability than in 15% probability. Significant negative correlations were observed between the amplitude of P300 and postural muscle showing the earliest onset, and the erecter spinae in both reaction tasks.Integrated late CNV and slope of late CNV were significantly smaller in the 3.5-s period than in the 2.0-s period. Start time of gasbncnemius was significantly earlier in the 3.5-s period than in the 3.0-s period. A significant correlation was found between start time of gastrocnemius activity and integrated late CNV.

许多以前的研究发现，控制站立姿势的腿部和躯干的姿势肌肉的激活开始时间早于快速移动手臂的焦点肌肉。在前人研究的基础上，我们假设当动作的启动容易预测并且为姿势控制做好充分的准备时，姿势肌肉的预先激活将被促进。采用事件相关电位(P300)研究了奇球范式下听觉刺激下GO信号驯服的不确定性与诱发脑电位的关系。在警示信号和GO信号之间的不同准备时间下进行反应任务，并分析联系负变(CNV)，在刺激呈现概率为15%的情况下，P300的波幅显著大于45%。前三角区对声音刺激的反应时间以45%的概率显著早于15%的概率。直立肌和腓肠肌激活三角肌前部的概率为45%，早于15%的概率。P300波幅与两种反应任务中起病最早的姿势肌和直立棘肌均呈显著负相关，3.5%~S期积分的晚期CNV和晚期CNV的斜率显著小于2.0%~S时期。3·5-S时期气息开始时间明显早于3·0-S时期。腓肠肌活动开始时间与晚期CNV积分显著相关。