Gyroscopic corrections improve wearable sensor data prior to measuring dynamic sway in the gait of people with Multiple Sclerosis. Issue 12 (9th September 2016)

• Record Type: Journal Article
• Authors: Brodie, Matthew A. D.; Psarakis, Michael; Hoang, Phu
• Is Part Of: Computer methods in biomechanics and biomedical engineering. Volume 19:Issue 12(2016)
• Page Start: 1339
• Page End: 1346
• Publication Date: 2016-09-09
• Subjects: Accelerometers -- gait -- wearable device -- Multiple Sclerosis -- gyroscope -- fusion; Biomechanics -- Data processing -- Periodicals; Biomedical engineering -- Periodicals; Biomechanics -- Periodicals; Biomedical Engineering -- methods -- Periodicals; Computing Methodologies -- Periodicals; 612.7
• DOI: 10.1080/10255842.2016.1140747
• Languages: English
• ISSNs: 1025-5842

Abstract

Abstract: Accelerometers are incorporated into many consumer devices providing new ways to monitor gait, mobility, and fall risk. However, many health benefits have not been realised because of issues with data quality that results from gravitational 'cross-talk' when the wearable device is tilted. Here we present an adaptive filter designed to improve the quality of accelerometer data prior to measuring dynamic pelvic sway patterns during a six minute walk test in people with and without Multiple Sclerosis (MS). Optical motion capture was used as the gold standard. Improved wearable device accuracy (≤4.4% NRMSE) was achieved using gyroscopic corrections and scaling filter thresholds by step frequency. The people with MS presented significantly greater pelvis sway range to compensate for their lower limb weaknesses and joint contractures. The visualisation of asymmetric pelvic sway in people with MS illustrates the potential to better understand their mobility impairments for reducing fall risk.