Name
Title | ||
|---|---|---|
Influence Of Emg-Signal Processing And Experimental Set-Up On Prediction Of Gait Events By Neural Network |
Abstract | ||
|---|---|---|
Machine-learning approaches are satisfactorily implemented for classifying and assessing gait events from only surface electromyographic (sEMG) signals during walking. However, it is acknowledged that the choice of sEMG-processing type may affect the reliability of methodologies based on it. Analogously, the number of sEMG signals involved in machine-learning procedure could influence the classification process. Aim of this study is to quantify the impact of different EMGsignal- processing specifications and/or different complexity of the experimental sEMG-protocol (different number of sEMG-sensors) on the performance of a neural-network-based approach for binary classifying gait phases and predicting gait-event timing. To this purpose, sEMG signals are collected from eight leg-muscles in about 10.000 strides from 23 healthy adults during walking and then fed to a multi-layer perceptron model. Four different signal-processing approaches are tested and five experimental set-ups (from four to one sEMG sensors per leg) are compared. Results indicate that both the choice of sEMG processing and the reduction of sEMG-protocol complexity actually affect classification/prediction performances. Moreover, the study succeeds in the double goal of identifying the linear envelope as the sEMG-processing type which reaches the best neural-network performance (classification accuracy of 93.4 +/- 2.3 %; mean absolute error 21.6 +/- 7.0 and 38.1 +/- 15.2 ms for heel-strike/toe-off prediction, respectively) and providing a quantification of the progressive deterioration of classification/prediction performances with the reduction of the number of sensors used (from 93.4 +/- 2.3%-79.9 +/- 6.1 % for classification accuracy). These findings could be very useful for clinics to the aim of choosing the most suitable approach balancing technical performances, patient comfort, and clinical needs. |
Year | DOI | Venue |
|---|---|---|
2021 | 10.1016/j.bspc.2020.102232 | BIOMEDICAL SIGNAL PROCESSING AND CONTROL |
Keywords | DocType | Volume |
Surface EMG, Machine learning, Neural networks, Gait-phase classification, EMG-signal processing, EMG sensors | Journal | 63 |
ISSN | Citations | PageRank |
1746-8094 | 2 | 0.47 |
References | Authors | |
0 | 4 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Francesco Di Nardo | 1 | 12 | 9.01 |
| Christian Morbidoni | 2 | 289 | 37.76 |
| Alessandro Cucchiarelli | 3 | 226 | 36.38 |
| sandro fioretti | 4 | 18 | 10.96 |