Electromyographic signal dynamic behavior in neuropathies spectral parameters evaluation and classification

Maria Marta Santos, Ana Luísa Gomes, Hugo Gamboa, Mamede De Carvalho, Susana Pinto, Carla Quintão

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disease characterized by motor neurons degeneration, which reduces muscular force, being very difficult to diagnose. Mathematical methods, such as Coherence, Phase Locking Factor (PLF), Fractal Dimension (FD), Lempel-Ziv (LZ) techniques, Detrended Fluctuation Analysis (DFA) and Multiscale Entropy (MSE) are used to analyze the surface electromiographic signal's chaotic behavior and evaluate different muscle groups' synchronization. Surface electromiographic signal acquisitions were performed in upper limb muscles, being the analysis executed for instants of contraction recorded from patients and control groups. Results from LZ, DFA and MSE analysis present capability to distinguish between the patient and the control groups, whereas coherence, PLF and FD algorithms present results very similar for both groups. LZ, DFA and MSE algorithms appear then to be a good measure of corticospinal pathways integrity. A classification algorithm was applied to the results in combination with extracted features from the surface electromiographic signal, with an accuracy percentage higher than 70% for 118 combinations for at least one classifier. The classification results demonstrate capability to distinguish both groups. These results can demonstrate a major importance in the disease diagnose, once surface electromyography (sEMG) may be used as an auxiliary diagnose method.

Original languageEnglish
Title of host publicationBIOSIGNALS 2015 - 8th International Conference on Bio-Inspired Systems and Signal Processing, Proceedings; Part of 8th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2015
PublisherSciTePress
Pages227-234
Number of pages8
ISBN (Electronic)978-989758069-7
Publication statusPublished - 2015
Event8th International Conference on Bio-Inspired Systems and Signal Processing, BIOSIGNALS 2015 - Lisbon, Portugal
Duration: 12 Jan 201515 Jan 2015

Conference

Conference8th International Conference on Bio-Inspired Systems and Signal Processing, BIOSIGNALS 2015
CountryPortugal
CityLisbon
Period12/01/1515/01/15

Keywords

  • Amyotrophic Lateral Sclerosis (ALS)
  • Classification
  • Coherence
  • Detrended Fluctuation Analysis (DFA)
  • Fractal Dimension (FD)
  • Ipsilateral
  • Lempel-Ziv (LZ)
  • Multiscale Entropy (MSE)
  • Phase Locking Factor (PLF)
  • Surface Electromyography (sEMG)

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