Online detection of freezing of gait with smartphones and machine learning techniques

Sinziana Mazilu, Michael Hardegger, Zack Zhu, Daniel Roggen, Gerhard Tröster, Meir Plotnik, Jeffrey M. Hausdorff

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Freezing of gait (FoG) is a common gait deficit in advanced Parkinson's disease (PD). FoG events are associated with falls, interfere with daily life activities and impair quality of life. FoG is often resistant to pharmacologic treatment; therefore effective non-pharmacologic assistance is needed. We propose a wearable assistant, composed of a smartphone and wearable accelerometers, for online detection of FoG. The system is based on machine learning techniques for automatic detection of FoG episodes. When FoG is detected, the assistant provides rhythmic auditory cueing or vibrotactile feedback that stimulates the patient to resume walking. We tested our solution on more than 8h of recorded lab data from PD patients that experience FoG in daily life. We characterize the system performance on user-dependent and user-independent experiments, with respect to different machine learning algorithms, sensor placement and preprocessing window size. The final system was able to detect FoG events with an average sensitivity and specificity of more than 95%, and mean detection latency of 0.34s in user-dependent settings.

Original languageEnglish
Title of host publication2012 6th International Conference on Pervasive Computing Technologies for Healthcare and Workshops, PervasiveHealth 2012
Pages123-130
Number of pages8
DOIs
StatePublished - 2012
Externally publishedYes
Event2012 6th International Conference on Pervasive Computing Technologies for Healthcare and Workshops, PervasiveHealth 2012 - San Diego, CA, United States
Duration: 21 May 201224 May 2012

Publication series

Name2012 6th International Conference on Pervasive Computing Technologies for Healthcare and Workshops, PervasiveHealth 2012

Conference

Conference2012 6th International Conference on Pervasive Computing Technologies for Healthcare and Workshops, PervasiveHealth 2012
Country/TerritoryUnited States
CitySan Diego, CA
Period21/05/1224/05/12

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