درخت حوزه‌های تخصصی

Loss of balance and postural control are the main reasons for falls among the elderly adults that are considered as serious elderly health challenges with high impacts on the quality of life. The cerebellum is involved in postural control as one of the key neural structures that receives many inputs from the sensory systems. Cerebellar transcranial direct current stimulation (ctDCS) is a popular noninvasive and safe method enabling the adjustment of cerebellar activity. Therefore, we investigated the effect of ctDCS on postural control variables among elderly population with a history of stroke. Thirty elderly individuals (60-75 years) participated in this study. After preliminary assessments of postural control strategies by post urography at six sensory conditions, they received five 20-min sessions of active ctDCS at 2mA (intervention, n = 15) or sham stimulation (control, n = 15) in a random manner. At the end of the stimulation process, postural control strategies were reassessed. After adjustment for pre-test values using the ANCOVA test, an improvement of the subjects' performance in the first four conditions was observed in the intervention group compared with the control group (P < 0.05). However, in the fifth (P = 0.24) and sixth (P = 0.58) conditions, there were no significant differences between the groups. The results of this study showed the significant effect of ctDCS on the postural control strategies. These improvements were reflected by normalization of strategy of postural control in elderly adults.

Sports diplomacy is regarded as one of the most important communicative components among nations in their international relations. Regarding the mentioned fact, the main objective of this study was to provide a paradigm of sport diplomacy in the foreign policy of Iran. This is a qualitative study with exploratory nature by applying the Strauss and Corbin grounded theory approach. The data collection tool was semi-structured interviews with 14 elites including sports experts and policymakers. Findings demonstrated 133 initial concepts in open coding, reduced into 27 categories, and categorized into six main themes to support the initial development of the model. The results showed that adopting appropriate strategies like managerial evolution, developing indigenous models, national brand-making through sports, educating and empowering human resources, legal and structural development of sports diplomacy, and cultural changes in Iranian professional sports could bring greater consequences that encourage governing bodies to alter attitudes toward the role of sports diplomacy, and to empowers foreign policy for strengthening mutual relations worldwide.