Portable objective assessment of upper extremity motor function in Parkinson's disease

• Published in: Parkinsonism & related disorders 2017-10, Vol.43, p.61-66
• Main Authors: Chahine, L.M., Uribe, L., Hogarth, P., McNames, J., Siderowf, A., Marek, K., Jennings, D.
• Format: Article
• Language: English
• Subjects: Adult; Aged; Aged, 80 and over; Disease Progression; Female; Hand - physiopathology; Humans; Male; Middle Aged; Movement - physiology; Objective motor testing; Parkinson Disease - pathology; Parkinson Disease - physiopathology; Parkinson's disease; Physical Examination; Psychomotor Performance - physiology; Severity of Illness Index
• ISSN: 1353-8020; 1873-5126
• DOI: 10.1016/j.parkreldis.2017.07.017

Objective, portable measures of motor function for out-of-office assessments are needed in Parkinson's Disease (PD). This study had 3 objectives. First, to examine change in objective motor measurements in PD (as assessed with the Objective PD Measurement (OPDM) system). Second, to correlate objective measures with clinical features and putative PD cerebrospinal fluid (CSF) and dopaminergic imaging biomarkers. Third, to assess participant compliance with and perceptions of serial in-home motor assessments. De novo PD subjects participating in this pilot study of the Parkinson Progression Markers Initiative (PPMI) completed OPDM assessments at home weekly for 3 months and in the clinic at baseline and 3-, 6-, and 12-months. Tasks included (i)digitography (ii)a repetitive hand tapping task and (iii)timed pegboard task. A global objective motor score (OMS) was derived from the latter three. MDS-UPDRS-III score was obtained at each time point, and CSF and dopamine transporter (DAT) SPECT at baseline. 27 participants, mean age 62.6 years, 19 male were included. A mean of 10.5 in-home assessments were completed. There was no significant change in in-home OMS over 12 weeks (p = 0.48). There was strong correlation between mean baseline OMS and MDS-UPDRS-III scores (spearman's rho = 0.60, p=