بررسی اثر آندی تحریک الکتریکی مستقیم قشری مغز (tDCS) بر عملکرد توجه پایدار و سرعت واکنش در بیماران مبتلا به مولتیپل اسکلروزیس (MS)

نویسندگان
1 دانشگاه موسسه علوم شناختی
2 دانشگاه آزاد اسلامی
3 پژوهشکده علوم شناختی
4 دانشگاه علوم پزشکی تهران
5 موسسه علوم شناختی
چکیده
مولتیپل اسکلروزیس (MS) یک وضعیت التهابی میلین زدای سیستم عصبی مرکزی است که اغلب به عنوان اختلالی خود ایمن در نظر گرفته می‌شود. این بیماران درگیر نقایص شناختی وسیع و گسترده‌ای همچون ضعف توجه و تمرکز و حافظه و سرعت پردازش هستند؛ لذا پژوهش حاضر با هدف بررسی اثر آندی تحریک الکتریکی مستقیم قشری مغز (tDCS) بر عملکرد توجه پایدار در بیماران مبتلا به MS در قالب یک طرح روش پیش آزمون-پس آزمون همراه با گروه کنترل انجام گرفت. بدین منظور 32 بیمار مبتلا به بیماری MS با استفاده از روش نمونه گیری در دسترس، انتخاب و به صورت تصادفی در دو گروه آزمایش و کنترل گمارده شدند. مداخله شامل 10 جلسه تحریک الکتریکی مستقیم بود که طی آن بیماران به دو گروه تقسیم شدند، یک گروه تحریک واقعی و گروه دیگر تحریک ساختگی یا شم دریافت کردند. ابزارهای پژوهش استفاده از خرده­ آزمون­های سرعت واکنش(RTI) و آزمون پردازش سریع اطلاعات دیداری (RVP) در آزمون کارکردهای عصبی دانشگاه کمبریج (CANTAB) بود. تجزیه و تحلیل داده‌ها بر اساس از آزمون تی مستقل و وابسته برای مقایسه نمره‌های پیش‌آزمون، پس آزمون در دو گروه آزمایش و کنترل انجام شد. نتایج نشان دهنده بهبود توجه پایدار و سرعت پردازش در گروه آزمایش در سطح معناداری 0.05 بود. بنابراین نتیجه می‌گیریم که تحریک الکتریکی مغز بصورت فراجمجمه ای منجر به بهبود نقص توجه پایدار و سرعت واکنش در بیماران مبتلا به ام اس می شود.
کلیدواژه‌ها

عنوان مقاله English

Investigating the Effect of Anodal tDCS on Sustained Attention in Patients with MS

نویسندگان English

Mehdi Jahani 1
Mohammad Nasehi 2
Mehdi Tehrani-Doost 3
Mohammad Hossein Harirchian 4
Mohammad-reza Zarrindast 5
چکیده English

Multiple sclerosis is a de-myelinating inflammatory condition of the central nervous system that is often thought of as an autoimmune disorder. These patients suffer from extensive cognitive impairments such as poor attention and concentration and memory and processing speed; Therefore, the aim of this study was to investigate the anodic effect of direct cortical electrical stimulation (tDCS) on sustained attention performance in patients with multiple sclerosis (MS) in a pretest-posttest design with a control group. For this purpose, 32 patients with MS were selected using available sampling method and randomly assigned to experimental and control groups. The intervention consisted of 10 sessions of direct electrical stimulation during which patients were divided into two groups, one group received real stimulation and the other group received sham stimulation or sham. The research instruments were the use of RTI and RVP subtests in CANTAB test. Data analysis was performed based on independent and dependent t-test to compare pre-test and post-test scores in experimental and control groups. The results showed an improvement in sustained attention and processing speed in the experimental group at a significant level of 0.05. Therefore, we conclude that transcranial electrical stimulation of the brain improves sustained attention deficit and speed of response in patients with MS.

کلیدواژه‌ها English

TDCS
reaction time
sustained attention
MS
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