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báo cáo hóa học: "Analysis of right anterolateral impacts: the effect of head rotation on the cervical muscle whiplash response"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài:Analysis of right anterolateral impacts: the effect of head rotation on the cervical muscle whiplash response | Journal of NeuroEngineering and Rehabilitation BioMed Central Research Open Access Analysis of right anterolateral impacts the effect of head rotation on the cervical muscle whiplash response Shrawan Kumar 1 Robert Ferrari2 and Yogesh Narayan3 Address 1Physical Therapy University of Alberta 3-75 Corbett Hall Edmonton Alberta T6G 2G4 Canada 2Department of Medicine University of Alberta Edmonton Alberta T6G 2B7 Canada and 3Physical Therapy University of Alberta 3-78 Corbett Hall Edmonton Alberta T6G 2G4 Canada Email Shrawan Kumar - shrawan.kumar@ualberta.ca Robert Ferrari - rferrari@shaw.ca Yogesh Narayan - yogesh.narayan@ualberta.ca Corresponding author Published 31 May 2005 Journal of NeuroEngineering and Rehabilitation 2005 2 11 doi l0.ll86 1743-0003-2-1 1 Received 26 November 2004 Accepted 3 1 May 2005 This article is available from http www.jneuroengrehab.cOm content 2 1 1 1 2005 Kumar et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http creativecommons.org licenses by 2.0 which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background The cervical muscles are considered a potential site of whiplash injury and there are many impact scenarios for whiplash injury. There is a need to understand the cervical muscle response under non-conventional whiplash impact scenarios including variable head position and impact direction. Methods Twenty healthy volunteers underwent right anterolateral impacts of 4.0 7.6 10.7 and 13.0 m s2 peak acceleration each with the head rotated to the left then the head rotated to the right in a random order of impact severities. Bilateral electromyograms of the sternocleidomastoids trapezii and splenii capitis following impact were measured. Results At a peak acceleration of 13.0 m s2 with the head rotated to the right the right trapezius generated 61 of its maximal voluntary