A review on crosstalk in myographic signals
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Crosstalk in myographic signals is a major hindrance to the understanding of local information related to individual muscle function. This review aims to analyse the problem of crosstalk in electromyography and mechanomyography.
An initial search of the SCOPUS database using an appropriate set of keywords yielded 290 studies, and 59 potential studies were selected after all the records were screened using the eligibility criteria. This review on crosstalk revealed that signal contamination due to crosstalk remains a major challenge in the application of surface myography techniques. Various methods have been employed in previous studies to identify, quantify and reduce crosstalk in surface myographic signals.
Although correlation-based methods for crosstalk quantification are easy to use, there is a possibility that co-contraction could be interpreted as crosstalk. High-definition EMG has emerged as a new technique that has been successfully applied to reduce crosstalk.
The phenomenon of crosstalk needs to be investigated carefully because it depends on many factors related to muscle task and physiology. This review article not only provides a good summary of the literature on crosstalk in myographic signals but also discusses new directions related to techniques for crosstalk identification, quantification and reduction. The review also provides insights into muscle-related issues that impact crosstalk in myographic signals.
KeywordsCrosstalk Electromyography Mechanomyography Signal contamination
Abductor digiti minimi
Abductor pollicis brevis
Average rectified value
Blind source separation
Extensor carpi ulnaris
Extensor carpi radialis
Extensor digitorum communis
Extensor digiti minimi
Flexor carpi radialis
Flexor carpi ulnaris
Flexor digitorum superficialis
Flexor digitorum profundus
Field electrode stimulation
Independent component analysis
Inter electrode distance
Motor unit action potential
Peak to peak
Rectus abdominis internal oblique
Root mean square
Transcranial magnetic stimulation
Transversus abdominis internal oblique
The authors would like to thank Universiti Teknikal Malaysia Melaka (UTeM) for providing a conducive platform to conduct the research. Funding was provided by e-Science Fund research grant, Ministry of Science, Technology and Innovation (MoSTI), Malaysia.
Conceived and designed the search experiment: IT, KS and MAA. Performed the search experiment: IT, KS and LCK. Contents arrangement: IT, KS and JH Wrote the paper: IT and KS.
Compliance with ethical standards
Conflict of interest
The authors of this article declare that they have no conflict of interest.
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