Measurement of EMG activity with textile electrodes embedded into clothing (original) (raw)
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Characterization of Textile Electrodes for Emg Measurements
Corpoconsciência, 2021
Textile electrodes are an alternative to conventional silver-chloride electrodes in wearable systems. Their easy integration in garments and comfort provided to the user make them an interesting development of textile engineering. The potential of such electrodes to allow more unobtrusive data collection in health and sports context may enable the development of biosensing garments to be used in biomechanics. However, proper validation of the recorded signals is paramount, and few studies have yet presented consistent methodologies for textile-based electromyographic recordings. This study presents the validation of the electrical and morphological properties of electromyographic signals recorded with textile electrode, in comparison to conventional silver-chloride electrodes. Results indicate that both sets of electrodes have identical signal-to-noise ratios, but with distinct impedance frequency responses. Electromyographic envelope morphologies are also identical, although textil...
Performances evaluation of textile electrodes for EMG remote measurements
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2013
This work focus on the evaluation of textile electrodes for EMG signals acquisition. Signals have been acquired simultaneously from textile electrode and from gold standard electrodes, by using the same acquisition system; tests were done across subjects and with multiple trials to enable a more complete analysis. This research activity was done in the frame of the European Project Interaction, aiming at the development of a system for a continuous daily-life monitoring of the functional performance of stroke survivors in their physical interaction with the environment.
Journal of sport rehabilitation, 2017
Using technical clothes with electrodes embedded in the clothing makes it possible to record the electrical activity produced by the activity of the skeletal muscles in activities of daily living. The aim of the study was to investigate the reliability of measuring lower-limb left-right electromyography (EMG) activity ratio with smart shorts during stair descent, stair ascent, and repeated unloaded squats among healthy working-aged subjects. Seventeen females (mean age 25.5 years), and 17 males (mean age 29.9 years) participated in this test-retest protocol carried out twice on the same day. Intra-class correlation coefficient (ICC) varied from 0.65 to 0.80 in the different activities. Mean difference and limits of agreement (LOA) between the repeated measurements were for descending stairs -0.8, LOA -6.2 to 4.7 percent unit, for ascending stairs -0.9, -6.5 to 4.7, and for squats -0.2, -5.4 to 4.9. The coefficient of repeatability for descending stairs was 5.6 percent unit, for asce...
Design and Testing of a Textile EMG Sensor for Prosthetic Control
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2020
Nowadays, Electromyography (EMG) signals generated by the amputee's residual limbs are widely used for the control of myoelectric prostheses, usually with the aid of pattern-recognition algorithms. Since myoelectric prostheses are wearable medical devices, the sensors that integrate them should be appropriate for the users'daily life, meeting the requirements of lightness, flexibility, greater motion identification, and skin adaptability. Therefore, this study aims to design and test an EMG sensor for prosthetic control, focusing on aspects such as adjustability, lightness, precise and constant signal acquisition; and replacing the conventional components of an EMG sensor with textile materials. The proposed sensor was made with Shieldex Technik-tex P130 + B conductive knitted fabric, with 99% pure silver plating. EMG data acquisition was performed twice on three volunteers: one with the textile sensor, and other with a commercial sensor used in prosthetic applications. Overall, the textile and the commercial sensor presented total average Signal-to-Noise Ratio (SNR) values of 10.24±5.45 dB and 11.74±8.64 dB, respectively. The authors consider that the obtained results are promising and leave room for further improvements in future work, such as designing strategies to deal with known sources of noise contamination and to increase the adhesion to the skin. In sum, the results presented in this paper indicate that, with the appropriate improvements, the proposed textile sensor may have the potential of being used for myoelectric prosthetic control, which can be a more ergonomic and accessible alternative to the sensors that are currently used for controlling these devices.
Textile based electrodes for ECG and EMG measurements
2017
This work is financed by FEDER funds through the Competitivity Factors Operational Programme - COMPETE and by national funds through FCT – Foundation for Science and Technology within the scope of the project POCI-01-0145-FEDER-007136.
Design of a Long Sleeve T-Shirt with ECG and EMG for Athletes and Rehabilitation Patients
Lecture Notes in Electrical Engineering, 2018
Considering the importance of strength training in sports injury prevention and rehabilitation, an e-textile system that assists the athlete's training and rehabilitation was designed. This paper reports the construction of a prototype of a T-shirt with embedded textile electrodes to monitor cardiac and muscle activity. Signal tests were conducted and are presented. It is the authors' intention to study and integrate other textile sensors that may provide useful information to the user.
Journal of sports science & medicine, 2018
The Athos ® wearable system integrates surface electromyography (sEMG ) electrodes into the construction of compression athletic apparel. The Athos system reduces the complexity and increases the portability of collecting EMG data and provides processed data to the end user. The objective of the study was to determine the reliability and validity of Athos as compared with a research grade sEMG system. Twelve healthy subjects performed 7 trials on separate days (1 baseline trial and 6 repeated trials). In each trial subjects wore the wearable sEMG system and had a research grade sEMG system's electrodes placed just distal on the same muscle, as close as possible to the wearable system's electrodes. The muscles tested were the vastus lateralis (VL), vastus medialis (VM), and biceps femoris (BF). All testing was done on an isokinetic dynamometer. Baseline testing involved performing isometric 1 repetition maximum tests for the knee extensors and flexors and three repetitions of...
Surface electromyography using textile-based electrodes
2012
Surface Electromyography (sEMG) is a fundamental method for study the biomechanical behavior of a person, allowing the extraction of valuable information for health professionals. This paper presents a research conducted with the purpose of developing textile electrodes for non invasive surface electromyography. Conducting fibers were used in a specifc arrangement taking into consideration SENIAM recommendations and embedded in a textile fabric. A comparison was made between conventional electrodes and the proposed ones. The results showed that the behavior is similar, which can constitute a valid alternative, overcoming some disadvantages such as the comfort for the user.
Sensors
Electromyography (EMG) is the resulting electrical signal from muscle activity, commonly used as a proxy for users’ intent in voluntary control of prosthetic devices. EMG signals are recorded with gold standard Ag/AgCl gel electrodes, though there are limitations in continuous use applications, with potential skin irritations and discomfort. Alternative dry solid metallic electrodes also face long-term usability and comfort challenges due to their inflexible and non-breathable structures. This is critical when the anatomy of the targeted body region is variable (e.g., residual limbs of individuals with amputation), and conformal contact is essential. In this study, textile electrodes were developed, and their performance in recording EMG signals was compared to gel electrodes. Additionally, to assess the reusability and robustness of the textile electrodes, the effect of 30 consumer washes was investigated. Comparisons were made between the signal-to-noise ratio (SNR), with no stati...