Journal of Arak University of Medical Sciences

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Showing 3 results for Electromyography

Comparing the Amount of EMG Activity of the Selected Involved Muscles in Ankle Strategy in Female Athletes While Standing on One Leg on Shuttle Balance and Wobble Board

Reyhaneh Mansouri, Reza Rajabi, Hooman Minoonejad,
Volume 18, Issue 2 (5-2015)

Abstract

Background: It seems that using shuttle balance which has recently been produced in Iran would be beneficial in exercise prescription for preventing sports injuries and recovery. The purpose of this study is comparing the amount of the electromyography activity of involved muscles in ankle strategy while standing on one leg on shuttle balance versus wobble board.

Materials and Methods: This study is a functional and cause-compare study. 15 female students 20-22 years of age having the enterance standards were selected meaningfully. The amount of EMG activity of selected muscles (Tibialis Anterior, Gastrocnemius, Rectus Femoris and Hamstring) was measured while standing on one leg on two devices. The difference in means of muscles activity in both of devices was estimated using multivariate analysis of variance.

Results: The results showed a significant difference between the amount of EMG activity of involved muscles (p=0.001). Also, the results of the intragroup effects showed that the electromyography activity of Tibialis Anterior, Rectus Femoris and Hamstring while standing on shuttle balance was significantly more than the activity while standing on wobble board (p<0.05). While the amount of activity on shuttle balance was higher as compared to wobble board, but there was no significant difference in Gastrocnemius EMG activity between two devices (p>0.05).

Conclusion: It seems that standing on shuttle balance can make higher electromyography activity in the muscles that are involved on ankle and thigh joints, i.e. Tibialis Anterior, Rectus Femoris and Hamstring. So it is recommended that shuttle balance can be used in balance training program.

Electromyographic Study of Masseter and Temporalis Muscles During Mastication in Children with and without Down Syndrome Aged 2-12 Years

Mohamadreza Arab, Abdolreza Yavari, Marzieh Babaee, Farhad Fatehi,
Volume 24, Issue 6 (1-2022)

Abstract

Background and Aim: Swallowing disorder is a common and constant problem in people with Down Syndrome. In experimental method electromyography can be used to evaluate Mastication . The aim of this study was to evaluate the electromyography of the masseter and temporal muscles during Mastication in 2 to 12 years old children with Down syndrome in Arak.
Material and methods: This is a descriptive-analytical and case-control study, that conducted with the purpose of electromyographic study of masseter and temporal muscles during Mastication on 15 children from available 2 to 12 years old Down Syndrome and 15 children that were matched according the method of person-to-person matching in terms of age and gender with samples with Down syndrome
Ethical considerations: In this study, conscious consent was obtained from all parents and no physical harm was inflicted on individuals.
Findings: About the comparison of the mean of amplitude (intensity) of electrical signal of muscle between two groups except right temporal muscle during Mastication and about the mean of the mean frequency when Mastication except for left temporal muscle, in other cases the difference was significant. In the case of comparing the median frequency of the electrical signal of the muscle in most muscles the difference was not significant.
Conclusion: Mean amplitude (intensity) and frequency of the mean electrical signal of the muscle when chewing in most muscles was different between the two groups with Down syndrome and normal, but the differences in mean median frequency in most muscles were insignificant.

The Effect of Clothing Weight on the Range of Lower Limb Muscle Activities during the Execution of Archery Skills in Blind People

Mohsen Barghamadi, Sara Imani Broj, Hamed Sheikhalizadeh,
Volume 27, Issue 1 (3-2024)

Abstract

Introduction: Today, disabled sports have become one of the most important categories in the world of sports. In the meantime, exercising the blind and visually impaired is essential. Therefore, the present study aimed to examine the effect of clothing weight on the range of lower limb muscle activities during the execution of archery skills in blind people.
Methods: The current research is semi-experimental and laboratory-type. The statistical sample of the present study included 30 blind boys from Ardabil City who were selected purposefully and voluntarily. The subjects were randomly divided into two groups. The shooting target was placed at a distance of 10 meters from the subject. A two-way analysis of variance and a t-test at a significance level of 0.05 were used for statistical analysis of the data.
Results: According to the obtained results, the effect of the time factor on the electrical activity of the vastus medialis muscle when releasing the bowstring was statistically significant. The impact of the group factor on the electrical activity of the tibialis anterior muscle when releasing the bowstring had a statistically significant difference. Also, the effect of the group factor when taking the bow in the rectus femoris muscle and biceps muscle had a statistically significant difference.
Conclusions: Finally, according to all the obtained results, it can be said that probably using shooting clothes by affecting the electrical activity of the muscles of the lower limbs can improve balance during shooting, which can be one of the influential reasons, and become efficient in the success of archers.

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