مقایسه زمان شروع فعالیت عضلات شکم در دو سمت تنه هنگام خم کردن اندام زبرین در افراد سالم : مطالعه‌ای درباره‌ی پاسخ‌های وضعیتی تنه

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دفتر تحقیقات و فن آوری دانشجویی. دانشجوی کاشناسی ارشد فیزیوتراپی، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی شهید بهشتی ، تهران ، ایران

2 استادیار گروه فیزیوتراپی، مرکز تحقیقات فیزیوتراپی، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی شهید بهشتی ، تهران، ایران

3 استاد گروه فیزیوتراپی ، دانشکده علوم توانبخشی ، دانشگاه علوم پزشکی شهید بهشتی ، تهران ، ایران

4 دانشیار گروه علوم پایه ، دانشکده علوم توانبخشی، دانشگاه علوم پزشکی شهید بهشتی ، تهران ، ایران

5 دانشجوی دکترای تخصصی آمار زیستی ، گروه آمار زیستی ، دانشکده پیراپزشکی، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران

10.22037/jrm.2016.1100173

چکیده

مقدمه و اهداف
هدف از این مطالعه بررسی زمان شروع فعالیت عضلات شکم در مقایسه با زمان شروع فعالیت عضله دلتویید اندام بالاتنه غالب هنگام پاسخ‌های وضعیتی پیش بینانه در افراد سالم می باشد.
مواد و روش ها
در این مطالعه‌ی مشاهده‌ای، 20 نفر خانم (با میانگین سنی25/3سال و22/36kg/m²BMI =) مورد بررسی قرار گرفتند . هنگام انجام حرکت خم کردن سریع شانه‌ی اندام غالب در وضعیت ایستاده ، داده های الکترومیوگرافی عضله عرضی شکم و مایل خارجی در هر دو سمت تنه و عضله دلتوییداندام غالب ثبت شد. در این افراد زمان شروع فعالیت عضلات تنه هنگام تنظیمات وضعیتی پیش بینانه بررسی شد .برای مقایسه زمان شروع فعالیت  عضلانی میان هر دو سمت تنه از آزمون آماری ناپارامتریک Wilcoxon signed ranked test استفاده شد .
یافته ها
در سمت مقابل اندام در حال حرکت عضله عرضی شکم و عضله مایل خارجیزودتر از عضله دلتوئید وارد عمل شدند اما عضلاتشکم در سمت اندام در حال حرکت به شکل قابل توجهی دیرتر از عضله دلتوئید شروع به فعالیت کردند و بین عضلات دو سمت تنه اختلاف معناداری از جهت زمان شروع فعالیت، دیده شد. (عضله عرضی شکمP=0/001, عضله مایل خارجیP=0/005)
بحث و نتیجه گیری
در افراد شرکت کننده در این مطالعه فعالیت پیش خوراندی عضلات شکم برای مقابله با اغتشاشات احتمالی ناشی از حرکت سریع اندام بالاتنه غالب تنها در سمت مقابل اندام  در حال حرکت مشاهده گردید  ولی عضلات شکم در سمت اندام در حال حرکت به شکل  پس خوراند وارد عمل شدند.  نتایج حاضر نشان دهنده ی  این  موضوع می باشد که عضلات شکم  نیز جزئی از سینرژی های مورب هستند که در ارتباط با انتقال مناسب حرکت و گشتاور تولیدی حاصل از حرکت اندام عمل می کنند. به نظر می رسد الگوی بکارگیری متقابل عضله عرضی شکم، الگوی مناسب تری نسبت به الگوی انقباض همزمان این عضله برای ثبات بخشیدن به تنه باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Comparison of bilateral abdominal muscles onset times during upper limb flexion in healthy subjects: Investigation of anticipatory postural responses

نویسندگان [English]

  • Maryam Khaleqi-Sohi 1
  • Sedigheh Sadat Naimi 2
  • khosro khademi kalantari 3
  • Alireza Akbarzadeh Baghban 4
  • Erfan Ghasemi 5
1 Student Research Office. MSc student in Physical Therapy, Department of Physiotherapy, School of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2 Assistant Professor, Physiotherapy Research Center, Department of Physiotherapy, School of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3 Professor, Department of Physiotherapy, School of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4 Associate Professor, PhD in Biostatistics, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
5 Ph.D candidate, Department of Biostatistics, School of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
چکیده [English]

Background and Aim: The present study was conducted to compare bilateral abdominal muscles onset times with that of dominant upper limb deltoid muscle associated with anticipatory postural responses in healthy participants.
Materials and Methods: In the current observational study, 20 healthy female individuals (mean age 25.3 yrs and BMI =22.36kg/m2) were studied. While they were performing rapid arm flexion in standing position with their dominant limb, electromygraphic data of Transverse Abdominus (TrA) and External Oblique (EO) in both sides and the deltoid muscle of dominant limb were recorded. The onset times of these muscles were the main measured parameter during anticipatory postural response. Wilcoxon signed-ranked test was used to compare bilateral abdominal muscles onset times.
Results: Contra lateral TrA and EO were recruited prior to deltoid muscle, but in Ipsilateral side these muscles were activated primarily after deltoid. There were significant differences between abdominal muscles onset time in comparison between the two sides of the trunk (TrA: p=0.001, EO: p=0.005).
Conclusion: Feed-forward activation of the abdominal muscles, prior to perturbation due to rapid arm movements, was observed for one body side in healthy subjects but these muscles in Ipsilateral side were activated in feedback manner. The results of the present study show that abdominal muscles are a part of diagonal synergies related to transferring movement and torque efficiently produced by the moving limb. It seems that reciprocal pattern of TrA muscle activation is a more efficient pattern in comparison with co-contraction pattern previosely introduced.

کلیدواژه‌ها [English]

  • Anticipatory postural response
  • Onset time
  • Transverse abdominus muscle
  • External oblique muscle
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