tailieunhanh - báo cáo hóa học: " Evaluation of methods for extraction of the volitional EMG in dynamic hybrid muscle activation"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Evaluation of methods for extraction of the volitional EMG in dynamic hybrid muscle activation | Journal of NeuroEngineering and Rehabilitation BioMed Central Research Evaluation of methods for extraction of the volitional EMG in dynamic hybrid muscle activation Eran Langzam1 Eli Isakov 2 and Joseph Mizrahi1 Open Access Address Department of Biomedical Engineering - Technion Israel Institute of Technology Haifa Israel and 2Loewenstein Rehabilitation Center Raanana Israel Email Eran Langzam - bmeran@ Eli Isakov - elii@ Joseph Mizrahi - jm@ Corresponding author Published 23 November 2006 Received 30 January 2006 A AAAZ J .IA I loz i-za-i AAAI - - -r Accepted 23 November 2006 Journal of NeuroEngineering and Rehabilitation 2006 3 27 doi 1743-0003-3-27 This article is available from http content 3 1 27 2006 Langzam et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Hybrid muscle activation is a modality used for muscle force enhancement in which muscle contraction is generated from two different excitation sources volitional and external by means of electrical stimulation ES . Under hybrid activation the overall EMG signal is the combination of the volitional and ES-induced components. In this study we developed a computational scheme to extract the volitional EMG envelope from the overall dynamic EMG signal to serve as an input signal for control purposes and for evaluation of muscle forces. Methods A synthetic database was created from in-vivo experiments on the Tibialis Anterior of the right foot to emulate hybrid EMG signals including the volitional and induced components. The database was used to .