نوع مقاله : مقاله پژوهشی

نویسندگان

1 استاد، گروه آسیب‌شناسی و حرکات اصلاحی، دانشکدة تربیت‌بدنی و علوم ورزشی، دانشگاه شهید باهنر کرمان، کرمان، ایران

2 گروه آسیب شناسی ورزشی و حرکات اصلاحی ، دانشکده تربیت بدنی و علوم ورزشی،دانشگاه شهید باهنر، کرمان، ایران

3 دانشیار، گروه آسیب‌شناسی و حرکات اصلاحی دانشکدة تربیت‌بدنی و علوم ورزشی، دانشگاه شهید باهنر کرمان، کرمان، ایران

4 استادیار، متخصص طب ورزشی دانشگاه علوم پزشکی کرمان، کرمان، ایران

چکیده

تاکنون پژوهش‌های متعددی درزمینة بررسی نقش بینایی در توانایی کنترل پاسچر افراد انجام شده‌اند و اهمیت اطلاعات بینایی را در این زمینه به‌خوبی نشان داده‌اند، ولی در هیچ‌یک از این گزارش‌ها به بررسی نقش اطلاعات بینایی در استراتژی‌های بازیابی تعادل پرداخته نشده است. داده‌هایسیستمدهلیزیبرایتثبیتنگاهکردنلازموحیاتیهستند؛بنابراین، می‌توانانتظارداشتکهکاراییسیستمبیناییدرافراد ناشنواازافرادعادیکمترباشد؛براین‌اساس، هدف از انجام پژوهش حاضر بررسی تأثیر حذف بازخورد بینایی بر استراتژی‌های بازیابی تعادل افراد ناشنوا بود. 15 زن ناشنوا با میانگین سنی25/2 ± 93/28 سال، قد  46/6 ± 73/156 سانتی متر و وزن 91/7 ± 06/58 کیلوگرم به‌عنوان آزمودنی‌های پژوهش انتخاب شدند. استراتژی‌های بازیابی تعادل با استفاده از حرکت ناگهانی تردمیل و توسط شش دوربین پرسرعت ثبت شدند. برای مقایسة متغیرهای پژوهش در دو وضعیت چشم باز و چشم بسته از آزمون تی زوجی استفاده شد.نتایج نشان داد که میزان نوسانات مفاصل ران و مچ پای ناشنوایان در پاسخ به اغتشاش‌های خلفی-قدامی و قدامی-خلفی با بستن چشم‌ها در حالت ایستاده می‌تواند به‌طور معناداری افزایشیابد (05/0 > P).همچنین، بین نسبت نوسانات مفصل ران به مچ پای ناشنوایاندر دو حالت چشم باز و چشم بسته تفاوت معنادار وجود نداشت (05/0 < P). حذف اطلاعات بینایی موجب افزایش نوسانات مفاصل ران و مچ پای ناشنوایان می‌شود، اما تغییر معناداری در نسبت نوسانات مفصل ران به مچ پا ایجاد نشده است؛ بنابراین، به‌نظر می‌رسد که اطلاعات بینایی نقش مهمی در انتخاب استراتژی‌های استفاده‌شده برای بازیابی تعادل در افراد ناشنوا ندارند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

the effect of eliminating visual feedback on the balance recovery strategies in deaf individuals

نویسندگان [English]

  • Mansoor Sahebozamani 1
  • Asma Salari 2
  • Abdolhamid Daneshjoo 3
  • fatemeh karimi afshar 4

1 Professor at Shahid Bahonar University of Kerman

2 Department of Sport Injuries and Corrective Exercises, Faculty of Physical Education and Sport Sciences, Shahid Bahonar University of kerman, Kerman, Iran.

3 Assistant Professor of Sport Injuries (Injury prevention)

4 Assistant Professor of Sport Medicine, Kerman University of Medical Sciences, Kerman, Iran.

چکیده [English]

Background and Aim: If Several studies have been done on the role of vision and importance of visual information in the ability of postural control, but none of these reports have examined the role of visual information on balance recovery strategies. The aim of this study was to investigate the effect of eliminating visual feedback on the balance recovery strategies in deaf individuals. Materials and Methods: 15 Deaf females (age 28.93±2.25 years, height 156.73±6.46 cm, and mean weight 58.06±7.91 kg) were selected as samples. Balance recovery strategies were recorded by six high-speed cameras after sudden movement of the treadmill. Paired-Sample T test was used for data analysis in open and closed eyes. Results: The results of this study showed that the mean of hip and ankle swings can be significantly increased by closing the eyes, both in the anterior-posterior and posterior-anterior disturbances (p<0.05). The results also showed that there is not a significant difference between the ratio of hip-to-ankle swings in open and closed eyes (p >0.05). Conclusion: The findings of this study showed that remove of visual information leads to increase in hip and ankle swings, but there is no significant difference in the ratio of hip-to-ankle swings. Therefore, visual information does not seem to play an important role in choosing the balance recovery strategies in deaf people.

کلیدواژه‌ها [English]

  • anterior-posterior disturbance
  • posterior-anterior disturbance
  • visual information
  • balance recovery strategies
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