摘要
本研究的目的是检测与指力相关的指浅屈肌(FDS)活动模式。设计了食指6、8、10、12 N等4个不同力量等级的单指压力实验,采用6×2(行×列)阵列电极采集8名受试者(男性4名,女性4名,年龄20～24岁)FDS的6通道sEMG信号,提取各通道sEMG信号特征值RMS,分析RMS与力量水平和FDS解剖位置的相关性。研究发现,随着食指力量水平的增大,各通道sEMG信号RMS均呈现递增趋势;相同力量水平下,FDS不同空间解剖位置处RMS幅值有显著性差异,处于FDS中间解剖位置的两通道sEMG信号RMS,对力量水平的敏感度几乎为其他通道的两倍。结果表明,FDS同一功能分区内,激活强度随手指力量水平的增加而呈现递增趋势;不同解剖位置激活强度差异性较大,对运动单位的募集具有空间选择性。
The objective of the study is to detect the activity pattern of flexor digitorum sublimis（FDS） related to finger force.8 subjects（four male and four female,aged from 20 to 24）） were recruited to produce a certain force level with index to match the ordered force level（6,8,10 and 12 N）.During the finger compression task,6-channel sEMG signals were recorded on FDS used a 6 × 2（row × column） electrode-array.The RMS value was calculated for each channel,and then the correlation between RMS and finger force level and the correlation between RMS and FDS anatomy position were analyzed.Our experimental results revealed that the RMS of sEMG signal of all channels increased with the increase of force level;At the same force level,the amplitude of RMS in the different location of FDS were different,and the sensitivity to force level of two channels located in middle anatomical location of FDS were almost twice the other channels.In the same functional district of FDS,with the increase of finger force,intensity of activation showed an increasing trend.While in the same functionality branch of FDS,the intensity of activation was disproportion,and the recruitment of motor unit was with space-selectivity.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
2010年第5期672-676,共5页
Chinese Journal of Biomedical Engineering
基金
国家自然科学基金资助项目(30770546,30970758)
重庆市自然科学基金(2006BB2043,2007BB5148)
重庆大学“211工程”三期创新人才培养计划建设项目(S-09104)
关键词
表面肌电(sEMG)
指浅屈肌
均方根
surface electromyography（sEMG）
flexor digitorum sublimis（FDS）
RMS
