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Sensors 2018, 18(2), 495; https://doi.org/10.3390/s18020495

Measurement of Axial Rigidity and Postural Instability Using Wearable Sensors

1
School of Engineering, Deakin University, Waurn Ponds, VIC 3216, Australia
2
Florey Institute of Neuroscience and Mental Health, Parkville, VIC 3052, Australia
*
Author to whom correspondence should be addressed.
Received: 8 December 2017 / Revised: 28 January 2018 / Accepted: 30 January 2018 / Published: 7 February 2018
(This article belongs to the Special Issue Smart Decision-Making)
Full-Text   |   PDF [2890 KB, uploaded 7 February 2018]   |  

Abstract

Axial Bradykinesia is an important feature of advanced Parkinson’s disease (PD). The purpose of this study is to quantify axial bradykinesia using wearable sensors with the long-term aim of quantifying these movements, while the subject performs routine domestic activities. We measured back movements during common daily activities such as pouring, pointing, walking straight and walking around a chair with a test system engaging a minimal number of Inertial Measurement (IM) based wearable sensors. Participants included controls and PD patients whose rotation and flexion of the back was captured by the time delay between motion signals from sensors attached to the upper and lower back. PD subjects could be distinguished from controls using only two sensors. These findings suggest that a small number of sensors and similar analyses could distinguish between variations in bradykinesia in subjects with measurements performed outside of the laboratory. The subjects could engage in routine activities leading to progressive assessments of therapeutic outcomes. View Full-Text
Keywords: biomedical signal processing; Parkinson’s disease; bradykinesia; rigidity; flexibility; damping ratio; principal component analysis biomedical signal processing; Parkinson’s disease; bradykinesia; rigidity; flexibility; damping ratio; principal component analysis
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Phan, D.; Horne, M.; Pathirana, P.N.; Farzanehfar, P. Measurement of Axial Rigidity and Postural Instability Using Wearable Sensors. Sensors 2018, 18, 495.

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