Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Influence of static lumbar flexion on the trunk muscles' response to sudden arm movements. | Chiropractic Osteopathy BioMed Central Research Open Access Influence of static lumbar flexion on the trunk muscles response to sudden arm movements Gregory J Lehman 1 Stephen Story2 and Robert Mabee2 Address department of Graduate Studies Canadian Memorial Chiropractic College Toronto ON Canada and 2Undergraduate Department CMCC Toronto ON Canada Email Gregory J Lehman - glehman@ Stephen Story - sstory@ Robert Mabee - rmabee@ Corresponding author Published 23 November 2005 Received 22 September 2005 Accepted 23 November 2005 Chiropractic Osteopathy 2005 13 23 doi 1746-1 340-13-23 r This article is available from http content 13 1 23 2005 Lehman et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Viscoelastic creep of lumbar ligaments prolonged forward bend has been shown to negatively influence the spine s muscular reflexive behaviour and spinal stability. No studies to date have investigated the influence of spinall viscoelastic creep on the feedforward response of the trunk muscles to sudden arm raises. Methods Surface myoelectric activity was collected from the transversus abdominis internal oblique the lower erector spinae and the deltoid muscle during sudden ballistic arm raising before and after 10 minutes of prolonged forward bend in 11 healthy participants free of low back injury. The timing of trunk muscle activity relative to the deltoid muscle was calculated for 5 trials before and 5 trials after the creep procedure. Results Viscoelastic creep had no influence on the feedforward response of the trunk muscles during sudden arm raises. A feedforward response of the trunk muscles was not seen in every study participant and during every trial.
