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Medical Journal of Islamic Republic of Iran، جلد ۲۹، شماره ۱، صفحات ۸۳۳-۸۳۸
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عنوان انگلیسی Changes in postural and trunk muscles responses in patients with chronic nonspecific low back pain during sudden upper limb loading
چکیده انگلیسی مقاله Background: Alterations in the neuromuscular control of the spine were found in patients with chronic low back pain (CLBP). Sudden loading of the spine is assumed to be the cause of approximately 12% of lower back injuries. However, some aspects of this problem, such as alterations in the sensory–motor control of the spine, remain questionable. This study investigated postural and neuro–motor changes in trunk muscles during sudden upper limb loading in patients with CLBP. Methods : Electromyography of the erector spinae (ES) and transverses abdominis/internal oblique (TrA/IO) and external oblique (EOA) muscles were recorded in 20 patients with CLBP and 20 asymptomatic individuals with eyes open (EO) and eyes closed (EC) conditions. Moreover, measurements of the center of pressure (COP) and vertical ground reaction force (GRF) or Fz were recorded using a force plate. Data were analyzed using paired t-test and independent t-test at the significance level of 0.05. Results : In patients with CLBP, decreased electrical activity of the ES muscle was observed under both the EO and EC conditions and that of the TrA/IO muscle was observed under the EO condition (p< 0.05). Other findings included a shorter peak latency of the ES muscle in the EO condition and a greater increase in the peak latency of the ES muscle following the EC condition (p< 0.05). No significant differences were observed in COP and GRF measurements between the groups. Conclusion : Electrical muscle activity may indicate less stiffening or preparatory muscle activity in the trunk muscle of patients with CLBP. Altered latency of the muscle may lead to microtrauma of lumbar structures and CLBP.
کلیدواژه‌های انگلیسی مقاله Low back pain, Abdominal muscles, Electromyography, Posture.
نویسندگان مقاله محمود اکبری | mahmood akbari
department of physiotherapy, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

جواد صراف زاده | javad sarrafzadeh
department of physiotherapy, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

نادر معروفی | nader maroufi
department of physiotherapy, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

حمید حقانی | hamid haghani
department of biostatistics, school of public health, iran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

نشانی اینترنتی http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-889&slc_lang=en&sid=en
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زبان مقاله منتشر شده en
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