tailieunhanh - báo cáo hóa học: " Comparison of knee motion on Earth and in space: an observational stud"

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: Comparison of knee motion on Earth and in space: an observational stud | Journal of NeuroEngineering and Rehabilitation BioMed Central Research Open Access Comparison of knee motion on Earth and in space an observational Study- Mark C Pierre1 2 Kerim O Genc1 2 5 Micah Litow1 2 5 Brad Humphreys6 Andrea J Rice1 2 Christian C Maender7 and Peter R Cavanagh 1 2 3 4 Address Department of Biomedical Engineering Lerner Research Institute Cleveland Clinic Cleveland OH USA 2Center for Space Medicine Cleveland Clinic Cleveland OH USA 3Department of Orthopaedic Surgery Cleveland Clinic Cleveland OH USA 4Orthopaedic Research Center Cleveland Clinic Cleveland OH USA 5Case Western Reserve University Cleveland OH USA 6ZIN Technologies Inc. Brook Park OH USA and 7NASA-Johnson Space Center Houston TX USA Email Mark C Pierre - pierrem@ Kerim O Genc - genck@ Micah Litow - mxl87@ Brad Humphreys - Andrea J Rice - ricea1@ Christian C Maender - Peter R Cavanagh - cavanap@ Corresponding author Published 13 April 2006 Received 06 October 2005 Journal of NeuroEngineering and Rehabilitation 2006 3 8 doi 1743-0003-3-8 Accepted 13 April 2006 This article is available from http content 3 1 8 2006 Pierre 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 Spaceflight has been shown to cause atrophy reduced functional capacity and increased fatigue in lower-limb skeletal muscles. The mechanisms of these losses are not fully understood but are thought to result in part from alteration in muscle usage. Methods Knee-joint angles and lower-extremity muscle activity were measured continually via elecrogoniometry and surface electromyography respectively from two subjects during entire .