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Time Series Classification for Detecting Parkinson's Disease from Wrist Motions

Parkinson's disease (PD) is a neurodegenerative condition characterized by frequently changing motor symptoms, necessitating continuous symptom monitoring for more targeted treatment. Classical time series classification and deep learning techniques have demonstrated limited efficacy in monitoring PD symptoms using wearable accelerometer data due to complex PD movement patterns and the small size of available datasets. We investigate InceptionTime and RandOm Convolutional KErnel Transform (ROCKET) as they are promising for PD symptom monitoring, with InceptionTime's high learning capacity being well-suited to modeling complex movement patterns while ROCKET is suited to small datasets. With random search methodology, we identify the highest-scoring InceptionTime architecture and compare its performance to ROCKET with a ridge classifier and a multi-layer perceptron (MLP) on wrist motion data from PD patients. Our findings indicate that all approaches are suitable for estimating tremor severity and bradykinesia presence but encounter challenges in detecting dyskinesia. ROCKET demonstrates superior performance in identifying dyskinesia, whereas InceptionTime exhibits slightly better performance in tremor and bradykinesia detection. Notably, both methods outperform the multi-layer perceptron. In conclusion, InceptionTime exhibits the capability to classify complex wrist motion time series and holds the greatest potential for continuous symptom monitoring in PD.

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