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ThinkMind // SEMAPRO 2016, The Tenth International Conference on Advances in Semantic Processing // View article semapro_2016_5_10_30050


Cyber-Physical System for Gait Analysis and Fall Risk Evaluation by Embedded Cortico-muscular Coupling Computing

Authors:
Valerio Francesco Annese
Giovanni Mezzina
Daniela De Venuto

Keywords: Fall prevention; EEG; EMG; MRPs; FPGA.

Abstract:
The paper describes the architecture of a non-invasive, wireless embedded system for gait analysis and preventing involuntary movements including fall. The system operates with synchronized and digitized data samples from 8 EMG (limbs) and 8 EEG (motor-cortex) channels. An embedded Altera Cyclone V FPGA operates the real-time signal pre-processing and the computation (resource utilization: 85.95% ALMs, 43283 ALUTs, 73.0% registers, 9.9% block memory; processing latency < 1ms). The system has been tested on patients affected by Parkinson disease (PD) under physician guide and compared with healthy subjects’ results. Both PD and healthy subjects have been involved in the standard diagnostic protocol (normal gait and pull test). The developed cyber-physical system detects differences between the PD and the healthy subjects in terms of walking pattern, i.e., agonist-antagonist co-contractions (Typ time: PD’s 148ms vs Healthy 88ms; Max: PD’s 388ms vs Healthy 314ms). The PD’s cerebral Movement Related Potentials (i.e., Bereitschaft) analysis during the pull-test showed an increasing from 59dBμ to 66dBμ after 3 settling steps while measurements on healthy subject return, respectively, 57dBμ, 62dBμ in 1 settling step. The system is able to prevent fall enabling the actuator in 168ms, i.e., better than the normal human time reaction (300ms).

Pages: 71 to 76

Copyright: Copyright (c) IARIA, 2016

Publication date: October 9, 2016

Published in: conference

ISSN: 2308-4510

ISBN: 978-1-61208-507-4

Location: Venice, Italy

Dates: from October 9, 2016 to October 13, 2016

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