| Autor: |
P. A. Karthick, Non-Invasive Imaging, Ramakrishnan Swaminathan, Divya Bharathi Krishnamani |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Biomedical Sciences Instrumentation. 57:356-360 |
| ISSN: |
1938-1158 |
| DOI: |
10.34107/yhpn9422.04356 |
| Popis: |
Surface electromyography (sEMG) is a technique which noninvasively acquires the electrical activity of muscles and is widely used for muscle fatigue assessment. This study attempts to characterize the dynamic muscle fatiguing contractions with frequency bands of sEMG signals and a geometric feature namely the instantaneous spectral centroid (ISC). The sEMG signals are acquired from biceps brachii muscle of fifty-eight healthy volunteers. The frequency components of the signals are divided into low frequency band (10-45Hz), medium frequency band (55-95Hz) and high frequency band (95-400Hz). The signals associated with these bands are subjected to a Hilbert transform and analytical shape representation is obtained in the complex plane. The ISC feature is extracted from the resultant shape of the three frequency bands. The results show that this feature can differentiate the muscle nonfatigue and fatigue conditions (p |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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