Development of a new assessment tool for cervical myelopathy using a Virtual Reality hand tracking sensor

Alagha, M. Abdulhadi, Alagha, Mahmoud Amir, Dunstan, Eleanor , Sperwer, Olaf, Timmins, Kate A. and Boszczyk, Bronek M. (2017) Development of a new assessment tool for cervical myelopathy using a Virtual Reality hand tracking sensor. Global Spine Journal, 7 (2S). 2S-189S. ISSN 2192-5682

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Introduction: Myelopathy hand is a characteristic feature of cervical myelopathy. Since there are only a few scales to quantify the severity of cervical compressive myelopathy, there is a need to introduce a universal objective platform in outpatient settings. Virtual-Reality offers promise as a means of producing quantitative data regarding the function of the neural system in the hand. The Leap Motion Controller (LMC) is a small, USB Virtual-Reality motion tracking device that could be used for this purpose. The aim of this study was to assess the reliability and validity of the LMC in the 15-second hand grip-and- release (G-R) test, as compared against human inspection of an external digital camera recording. Moreover, to set a baseline measurement of the number of hand flexion-extension cycles and analyse the degree of motion in young healthy individuals, besides examining gender and dominant hand differences. Materials and Methods: Fifty healthy participants were asked to fully grip-and-release their dominant hand as rapidly as possible for three tests, each separated by a 10-minute rest, while wearing a non-metal wrist splint. The first two tests lasted for 15 seconds, and a digital camera was used to film the anterolateral side of the hand on the first test. The third test lasted for a maximum of three minutes or until subjects fatigued. Three assessors counted the frequency of G-R cycles, of the recorded videos, independently and in a blinded fashion. One assessor counted the frequency of grip-and-release cycles as well as the number of motions (magnitude of motion) from the data output of the LMC. The average mean frequency of the three video observers was compared with that measured by LMC using the Bland-Altman method. Test-retest reliability was examined by comparing the two 15-second tests. Results: The mean number of G-R cycles recorded in each 15-second test was: 47.8 + 6.4 (test 1, video observer); 47.7 + 6.5 (test 1, LMC); and 50.2 + 6.5 (test 2, LMC). Bland Altman indicated a bias of 0.15 cycles (95%CI 1⁄4 0.10-0.20), with upper and lower limits of agreement

Keywords:Cervical myelopathy, Virtual Reality, Grip and release test, reliability and validity
Subjects:A Medicine and Dentistry > A300 Clinical Medicine
Divisions:College of Social Science > School of Sport and Exercise Science
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ID Code:28090
Deposited On:04 Aug 2017 09:39

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