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    Assessment of hip muscles using surface EMG in gait analysis
    (2020) Karahan, Menekfle; Cıgalı, Bülent Sabri
    Objectives: The rectus femoris muscle flexes the thigh, while the gluteus maximus muscle extends it. Understanding the activations of these two muscles that function in opposition to each other during walking facilitates the interpretation of gait pathologies. The aim of this study was to evaluate the activations of these muscles during walking by using the surface electromyography (EMG) technique. Methods: Twenty female volunteers aged 18–26 years participated in our study. The electrical activation of the rectus femoris and gluteus maximus muscles of the participants was simultaneously evaluated by gait analysis. At the same time, spatiotemporal parameters and phase parameters were obtained. Results: The activation pattern of both muscles was found to be similar. Both muscles reached the highest activation in the swing phase. The lowest activation was also seen in the pre-swing phase. Both muscles were observed to be active in the loading and single-limb support phases. Conclusion: The fact that these two antagonists muscles are active at the same time suggests that one is functioning concentrically, while the other eccentrically. Thus, stabilization of hip joint is provided when the body moves forward.
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    Do anthropometric characteristics of head and neck affect the craniocorpographic balance measurement?
    (2020) Çıkmaz, Selman; Uluçam, Enis; Yılmaz, Ali; Parlak, Muhammed; Karahan, Menekfle; Dönmez, Didem; Kayatekin, Ayşe Zeynep Yılmazer
    Objectives: The present work aimed to study the relationship of some head and neck anthropometric characteristics withthe data obtained from balance analysis.Methods: Thirty healthy male volunteers participated in the study. The measurements obtained at the same time of day(10:00–12:00). Craniocorpography section of the CMS20P-2 (Zebris© Medical GmbH, Isny im Allgäu, Germany) was used formeasurements. The head length, head circumference, head width, neck circumference and neck width and length anterior-posteriordiameter were measured. As the balance values, the longitudinal deviation, lateral sway width, angular deviation, self-spin,longitudinal sway, lateral sway, angle of torticollis were evaluated. The relationships between data were compared statistically.Results: The head length showed moderate correlation with lateral sway width (r=-0.29), self-spin (r=-0.35) and lateral sway(r=0.28). A moderate positive relationship was found between the head length and longitudinal deviation. The correlation wasalso moderate between neck circumference, neck width and longitudinal sway. Neck circumference and neck width valuesshowed a moderate correlation with longitudinal sway (r=0.46 and r=0.36).Conclusion: The results of this showed that there is a moderate correlation between the balance and the head-neck characteristics.