Title :
Evaluation of EMG features of trunk muscles during flexed postures
Author :
Naji, M. ; Firoozabadi, Mohammad ; Kahrizi, S.
Author_Institution :
Dept. of Biomed. Eng., Islamic Azad Univ., Dezful, Iran
Abstract :
Flexed postural tasks are frequently involved in daily activities, this paper evaluated a wide range of trunk muscle electromyogram (EMG) features to find the best feature spaces that discriminate among different trunk flexion angles. Using Davies-Bouldin index (DBI) and Calinski-Harabasz index (CHI) it was found that zero crossings, mean power frequency, median power frequency, and second order cumulants of extensor muscles´ EMG, independent of holding load level and electrode location (right or left side of muscle) are the most sensitive features to trunk flexion angle variation.
Keywords :
biomedical electrodes; electromyography; feature extraction; medical signal processing; Calinski-Harabasz index; Davies-Bouldin index; EMG feature evaluation; daily activity; electrode location; extensor muscle EMG; feature spaces; flexed posture tasks; holding load level; power frequency; second order cumulants; trunk flexion angle variation; trunk muscle electromyogram feature evaluation; EMG; Feature evaluation; Postural tasks; Trunk muscles;
Conference_Titel :
Biomedical Engineering (ICBME), 2012 19th Iranian Conference of
Conference_Location :
Tehran
Print_ISBN :
978-1-4673-3128-9
DOI :
10.1109/ICBME.2012.6519660
