title: Unconstrained detection of freezing of Gait in Parkinson's disease patients using smartphone.
abstract: Freezing of gait (FOG) is a common motor impairment to suffer an inability to walk, experienced by Parkinson's disease (PD) patients. FOG interferes with daily activities and increases fall risk, which can cause severe health problems. We propose a novel smartphone-based system to detect FOG symptoms in an unconstrained way. The feasibility of single device to sense gait characteristic was tested on the various body positions such as ankle, trouser pocket, waist and chest pocket. Using measured data from accelerometer and gyroscope in the smartphone, machine learning algorithm was applied to classify freezing episodes from normal walking. The performance of AdaBoost.M1 classifier showed the best sensitivity of 86% at the waist, 84% and 81% in the trouser pocket and at the ankle respectively, which is comparable to the results of previous studies.
authors.forename: Hanbyul
authors.initials: H
authors.lastname: Kim
authors.forename: Hong Ji
authors.initials: HJ
authors.lastname: Lee
authors.forename: Woongwoo
authors.initials: W
authors.lastname: Lee
authors.forename: Sungjun
authors.initials: S
authors.lastname: Kwon
authors.forename: Sang Kyong
authors.initials: SK
authors.lastname: Kim
authors.forename: Hyo Seon
authors.initials: HS
authors.lastname: Jeon
authors.forename: Hyeyoung
authors.initials: H
authors.lastname: Park
authors.forename: Chae Won
authors.initials: CW
authors.lastname: Shin
authors.forename: Won Jin
authors.initials: WJ
authors.lastname: Yi
authors.forename: Beom S
authors.initials: BS
authors.lastname: Jeon
authors.forename: Kwang S
authors.initials: KS
authors.lastname: Park
mesh_terms: D061725:Accelerometry / Q000295:instrumentation; D000058:Accidental Falls; D000368:Aged; D000465:Algorithms; D005260:Female; D005684:Gait; D020233:Gait Disorders, Neurologic / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D008297:Male; D010300:Parkinson Disease / Q000175:diagnosis* / Q000503:physiopathology; D000068997:Smartphone; D016138:Walking