The Change of Spectral Energy Distribution of Surface EMG Signal During Forearm Action Process
摘要：Spectral energy distribution of surface EMG signal is often used but difficultly and effectively control artificial limb, because the spectral energy distribution changes in the process of limb actions. In this paper, the general characteristics of surface EMG signal patterns were firstly characterized by spectral energy change. 13 healthy subjects were instructed to execute forearm supination (FS) and forearm pronation (FP) with their right forearms when their forearm muscles were "fatigue" or "relaxed". All surface EMG signals were recorded from their right forearm flexor during their right forearm actions. Two sets of surface EMG signals were segmented from every surface EMG signal appropriately at preparing stage and acting stage. Relative wavelet packet energy (symbolized by pnp and pna respectively at preparing stage and acting stage, n denotes the nth frequency band) of surface EMG signal firstly was calculated and then, the difference (Pn =Pna -Pnp) were gained. The results showed that Pn from some frequency bands can effectively characterize the general characteristics of surface EMG signal patterns. Compared with Pn in other frequency bands, P4, the spectral energy change from 93.75 to 125 Hz,was more appropriately regarded as the features.
机标关键词：Surface EMG Signalsurface EMG signalenergy distributionwavelet packetsets of
分类号：R318.04(医用一般科学)
资助基金：国家重点基础研究发展计划(973计划)(2005CB724303)云南省教育厅资助项目(03Y3081)
论文发表日期：2007-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：11( 55-65 )
英文信息