Title
Measuring Gait Quality in Parkinson's Disease through Real-Time Gait Phase Recognition.
Abstract
Monitoring gait quality in daily activities through wearable sensors has the potential to improve medical assessment in Parkinson's Disease (PD). In this study, four gait partitioning methods, two based on thresholds and two based on a machine learning approach, considering the four-phase model, were compared. The methods were tested on 26 PD patients, both in OFF and ON levodopa conditions, and 11 healthy subjects, during walking tasks. All subjects were equipped with inertial sensors placed on feet. Force resistive sensors were used to assess reference time sequence of gait phases. Goodness Index (G) was evaluated to assess accuracy in gait phases estimation. A novel synthetic index called Gait Phase Quality Index (GPQI) was proposed for gait quality assessment. Results revealed optimum performance (G < 0.25) for three tested methods and good performance (0.25 < G < 0.70) for one threshold method. The GPQI resulted significantly higher in PD patients than in healthy subjects, showing a moderate correlation with clinical scales score. Furthermore, in patients with severe gait impairment, GPQI was found higher in OFF than in ON state. Our results unveil the possibility of monitoring gait quality in PD through real-time gait partitioning based on wearable sensors.
Year
DOI
Venue
2018
10.3390/s18030919
SENSORS
Keywords
Field
DocType
gait quality,gait phases recognition,machine learning,Parkinson's disease,motor fluctuations,wearable sensor system
Parkinson's disease,Gait,Resistive sensors,Electronic engineering,Correlation,Engineering,Physical medicine and rehabilitation,Gait impairment
Journal
Volume
Issue
ISSN
18
3.0
1424-8220
Citations 
PageRank 
References 
4
0.57
10
Authors
12