با همکاری مشترک دانشگاه پیام نور و انجمن عصب روان‌شناسی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد تربیت بدنی دانشگاه تهران، تهران، ایران.

2 دانشیار رفتار حرکتی دانشکده تربیت بدنی و علوم ورزشی دانشگاه تهران، تهران، ایران.

چکیده

مطالعه حاضر با هدف اثر ‏تحریک الکتریکی مستقیم فراجمجمهای (‏tDCS‏) قشر بینایی بر اکتساب و ماندگاری عملکرد حرکتی و حافظه کاری کودکان دارای اختلال هماهنگی رشدی انجام گرفت. در این مطالعه نیمه‌تجربی، با طرح تحقیق پیش‌آزمون- پس‌آزمون و دوره پیگیری 1 و 42 روزه، 24 کودک دارای اختلال هماهنگی رشدی به‌صورت در دسترس انتخاب و به‌صورت تصادفی در 2 گروه 12 نفری تمرینات tDCS ناحیه بینایی و تحریک ساختگی قرار گرفتند. شرکتکنندگان در پیش‌آزمون، به اجرای 3 آزمون حافظه کاری و 10 مهارت پرتاب کردن و گرفتن پرداختند. مرحله مداخله در 5 روز متوالی انجام گرفت که در هر روز، ابتدا تحریک الکتریکی مغز از قشر بینایی (آند Oz و کاتد Cz) و تحریک ساختگی انجام می‌گرفت و سپس شرکتکنندگان به اجرای 3 آزمون حافظه کاری و 10 مهارت پرتاب کردن و گرفتن میپرداختند. در آخرین جلسه، پس‌آزمون اجرا گردید. 1 روز و 42 روز بعد از مرحله پس‌آزمون، به ترتیب مرحله پیگیری کوتاه‌مدت و بلندمدت انجام گرفت. داده‌ها به روش تحلیل واریانس مرکب تحلیل شد. نتایج نشان داد که تحریک الکتریکی فراجمجمهای قشر بینایی، باعث بهبود معنیدار حافظه کاری و عملکرد حرکتی کودکان با اختلال هماهنگی رشدی گردید. دیگر نتایج، حاکی از ماندگاری حافظه کاری و عملکرد حرکتی کودکان دارای اختلال هماهنگی رشدی در آزمون‌های پیگیری کوتاه‌مدت و بلندمدت بود. به‌طور کلی، نتایج مطالعه حاضر بر اثربخشی تمرینات tDCS ناحیه بینایی، بر عملکرد و حافظه کاری کودکان اختلال هماهنگی رشدی تأکید دارد.

کلیدواژه‌ها

عنوان مقاله [English]

the Effect of Transcranial Direct Electrical Stimulation (tDCS) of the Visual Cortex on the Acquisition and Persistence of Motor Performance and Working Memory in Children with Developmental Coordination Disorders.

نویسندگان [English]

  • Fariba Jazini 1
  • Mahmood Sheikh 2

1 Master of Physical Education, University of Tehran, Tehran, Iran.

2 Associate Professor of Movement Behavior, Faculty of Physical Education and Sports Sciences, University of Tehran, Tehran, Iran.

چکیده [English]

The purpose of the current study was to examine the effect of transcranial direct electrical stimulation (tDCS) of the visual cortex on the acquisition and persistence of motor performance and working memory in children with developmental coordination disorders. In semi-experimental study with pre-test-post-test research plan and follow-up period of 1 and 42 days, 24 children with developmental coordination disorder were randomly selected, and randomly assigned to 2 groups of 12 tDCS visual cortex and sham stimulation. Participants in the pre-test performed 3 working memory tests and 10 throwing and catching skills. The intervention phase was performed for 5 consecutive days. Each day, electrical stimulation of the brain from the visual cortex (Oz anode and Cz cathode) and sham stimulation was performed. Participants performed 3 working memory tests and 10 throwing and catching skills. In the last session, post-test phase was performed. 1 day and 42 days after the post-test phase, short-term and long-term follow-up phases were performed, respectively. Data were analyzed with mixed analysis. The results showed that tDCS of the visual cortex significantly improved working memory and motor performance in children with developmental coordination disorders. Other results indicated the persistence of working memory and motor performance in children with developmental coordination disorders in short-term and long-term follow-up tests. In general, the results of the present study emphasize the effectiveness of tDCS in the vision area on motor performance and working memory in DCD children.

کلیدواژه‌ها [English]

  • Electrical Stimulation
  • vision cortex
  • motor performance
  • working memory
  • persistence
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