Yazar "Yildirim, Mustafa Selman" seçeneğine göre listele

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    Analysis of EMG Signals in the Quadratus Lumborum Muscle of Healthy Subject with Functional Leg Length Discrepancy
    (IEEE, 2017) Eryigit, Sevim; al Kafee, Abdullah; Yildirim, Mustafa Selman; Akan, Aydin
    The purpose of this study was to analyze the electromyography (EMG) signals of the Quadratus Lumborum (QL) muscle activity on leg length discrepancy (LLD) and pelvic asymmetry. So we investigated whether pelvic asymmetry might cause injuries in lumbar spine and lower extremity. This was a randomized control experiment, total 50 (25 males and 25 females) datas were analyzed. All participants were right handed. Iliac crest levels were assessed by manually and LLD measurement was used with tape. EMG signals of the QL muscle were taken in the resting position without any activity intentionally in the prone position. Analysis of the data revealed that the QL muscles activity were higher at the pelvic elevation on the right side than on the left side. While there was a shortness in the lower extremity 27% of the cases on the right condition but it was statistically determined that 23% of the left side was short. At the same time, 100% of the cases in the lower extremity on the right side were found to be in the right iliac crest elevation position. Unilateral hyperactivity of the QL muscle leads to instability of the spine and pelvic muscles and causing pelvis asymmetry and functional LLD As a result, unbalanced loading on the spine and lower extremities may result in injury.
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    ELECTROMYOGRAPHIC ANALYSIS OF UPPER EXTREMITY MUSCLES DURING OVERHEAD WORK
    (IEEE, 2015) Kinali, Gulsah; Kara, Sadik; Yildirim, Mustafa Selman
    It is known that repeated movements of upper extremities result in over use injuries however, it is really challenging to distinguish which of them do so. Primary aim of the project is to determine the effect of different shoulder positions on gripping capability of hand and electro physiologic activityof upper extremity muscles. 23 case report data which have ages ranging between 18 and 30 are analysed. Depending on the shoulder flexion, hand gripping capability decreased explicitly. Suggested to analyse together with the fact that at levels higher than shoulders, despite maximum muscular activitythe hand gripping capability decreased explicitly is interpreted so that when the arm is raised the extremity exerts higher efforts for stabilizing the arm rather than ripping function. According to our results, as the shoulder flexion increases, muscular activity and depending on this the muscular exhaustion also increases where as the functional quality of hand decreases. The case is both a risk factor for an occupational disease and a situation that decreases skillful functioning of hands. For the next researches, advantages of exhaustion reducing apparatus and ergonomic systems, which can be used during works requiring over shoulder movements, are EMG results.