IP International Journal of Aesthetic and Health Rejuvenation

Measures of dispersion of WCs EMG waveforms variability: A study with automatic multi-channel guided low-cost high-speed electromyography

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Article Type : Original Article

Author Details: V R Raju*,B. K. Rani,K. Srinivas,M. Varaprasad Rao,R Kumar Patra,G. Madhukar,D Anji Reddy

Volume : 4

Issue : 3

Online ISSN : XXXX

Print ISSN : XXXX

Article First Page : 57

Article End Page : 60

Abstract

Electromyography is very much useful in the identification of target muscles for injecting the drug such as botulinum toxin This study showed significant quantifiable EMG differences in the muscle’s signals seen while writing with the right and left hands between those writer’s cramp patients with concordant mirror movements (C group) versus those with discordant mirror movements (D group). This was mainly seen in the measures of dispersion of the signal i.e., standard dispersion, variances and their ratio (F-ratio). These were statistically significantly different between the two groups, C and D, and the pattern of differences were consistent with the hypothesis that the discordant group had a compensatory force which overcame the dystonic force resulting in the final abnormal posture. This was seen in the form of larger variances and standard differences in the RHWS in the D group as compared to the C group, as the dystonic and compensatory forces both contribute to the instability. These differences were robust and seen in every measure of dispersion, such as in the patterns of significance of f-values for ratios of variances.

Keywords: Electromyography, Human nervous system, Neuromuscular control system, Concordant, discordant, Measures of dispersion, Mean, standard deviation, Student t-test, Fisher`s f-test, variance.

Doi No:-10.18231