Essential tremor quantification based on the combined use of a smartphone and a smartwatch: The NetMD study

Journal of Neuroscience Methods
Roberto López-BlancoEduardo Rocon

Abstract

The use of wearable technology is an emerging field of research in movement disorders. This paper introduces a clinical study to evaluate the feasibility, clinical correlation and reliability of using a system based in smartwatches to quantify tremor in essential tremor (ET) patients and check its acceptance as clinical monitoring tool. The system is based on a commercial smartwatch and an Android smartphone. An investigational Android application controls the process of recording raw data from the smartwatch three-dimensional gyroscopes. Thirty-four ET patients were consecutively enrolled in the experiments and assessed along one year. Arm tremor was videofilmed and scored using the Fahn-Tolosa-Marin Tremor Rating Scale (FTM-TRS). Tremor intensity was quantified with the root mean square of angular velocity measured in the patients' wrists. Eighty-two assessments with smartwatches were performed. Spearman's correlation coefficients (ρ) between clinical tremor (FTM-TRS) scores and smartwatch measures for tremor intensity were 0.590 at rest; ρ = 0.738 in steady posture; ρ = 0.189 in finger-to-nose maneuvers; and ρ = 0.652 in pouring water task. Smartwatch reliability was checked by intraclass realiability coefficients: 0.85, 0.9...Continue Reading

Citations

Aug 20, 2019·BMC Medical Informatics and Decision Making·David G WesternAngela Davies-Smith
Nov 9, 2018·Multiple Sclerosis International·Maddalena SparacoSimona Bonavita
Mar 5, 2021·Current Neurology and Neuroscience Reports·Jamie L AdamsRuth B Schneider
Jun 29, 2021·Frontiers in Neurology·Basilio VescioAldo Quattrone

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