Issue 1-20, 2020

Myographic analysis of upper extremity muscles reaction on physical exercises in patients with stroke

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1 Vakhitov B.I., 1 Raginov I.S., 1 Vakhitov I.H., 1 Safin R.S.

1 Kazan Federal University, Kazan, Russia


ABSTRACT

The article presents study results of 85 patients in the early recovery period of ischemic stroke in the carotid pool withleading hemiparesis syndrome. 51 men and 34 women aged 42–65 years, average age 57.3 years. The control group of 20healthy subjects, comparable by gender and age. The aim of the study was to estimate the characteristics of activation adequacyand coordination ratio of muscles in patients with ischemic stroke in the carotid pool, in the early recovery perioddepending on its severity. We estimate amplitude of maximal arbitrarily muscle activity in antagonists of the shin, forearm,and by defeat adequacy ratios and reciprocity calculation from two sides using the surface electromyography (EMG). Allpatients were divided into 2 groups according Barthel index. The first group of 29 patients had a mild degree of everydaylife dependence, that was interpreted as mild severity. The second group of 56 patients had moderate severity. The severityof hemiparesis in all patients was evaluated from mild to moderate (muscle strength of 3–4.5 scores). In patients of the firstgroup, on the paresis side, we observed an increase in reciprocity coefficient up to 104% in the forearm extensors and theadequacy coefficient to 85% in the forearm flexors. Patients of the second group showed an increase in reciprocity shin flexorsand forearm extensors up to 89%, as well as defeat adequacy ratios in the shin extensors up to 76% on the paresis side.In nonparetic limbs in patients of the first group, the reciprocity coefficient (up to 68%) and adequacy ratio (up to 53%) wereelevated. In patients of the second group, reciprocity and defeat adequacy ratios in nonparetic limbs were higher comparesto the first group (up to 72%). The method of EMG with estimation of reciprocity and defeat adequacy ratios makes objectiveboth paresis severity and muscle tone disorders in paretic and non-paretic limbs. It can also be used for evaluation of motordefect improvement and rehabilitation effect in patients with mild to moderate severity central hemiparesis syndrome.


KEYWORDS: ischemic stroke, hemiparesis, electromyography, Barthel scaule.


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This is an open article under the CC BY 4.0 license. Published by the National Medical Research Center for Rehabilitation and Balneology.