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báo cáo hóa học: "New method of measuring wrist joint position sense avoiding cutaneous and visual inputs"

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: New method of measuring wrist joint position sense avoiding cutaneous and visual inputs | Gay et al. Journal of NeuroEngineering and Rehabilitation 2010 7 5 http www.jneuroengrehab.eom content 7 1 5 J NER JOURNAL OF NEUROENGINEERING AND REHABILITATION RESEARCH Open Access New method of measuring wrist joint position sense avoiding cutaneous and visual inputs Andre Gay Kimberly Harbst Kenton R Kaufman Diana K Hansen Edward R Laskowski and Richard A Berger Abstract Background Aspects of afferent inputs generally termed proprioception are being increasingly studied. Extraneous factors such as cutaneous inputs can dramatically interfere while trying to design studies in order to determine the participation of the different structures involved in proprioception in the wrist position sense. We tried to determine validity and repeatability of a new wrist joint position measurement device using methodology designed to minimize extraneous factors and isolate muscle and joint inputs. Methods In order to test the reliability of the system eighty young-adult subjects without musculoskeletal or neurologic impairments affecting the right upper extremity were tested using a custom made motion tracking system. Testing consisted of two conditions active reproduction of active placement and passive reproduction of passive placement. Subjects performed two repetitions of each target position 10 20 and 30 of flexion and extension presented in a random order. Test- retest reliability was then tested. Results The average constant error in the passive condition was -0.7 4.7 as compared to the active condition at 3.7 5.1 . Average absolute error in the passive condition was 4.9 2.9 compared to the active condition in which absolute error was 5.9 3.5 . Discussion Test-retest repeatability in both conditions was less than the 5 magnitude typical of clinical goniometry. Errors in the active condition less than 2 were slightly smaller than the passive condition and the passive condition was also associated with poorer consistency between apparatus sensors and skin sensors. .