title: Objective quantification of upper extremity motor functions in Unified Parkinson's Disease Rating Scale Test.
abstract: Two tri-axial accelerometers were placed on the wrists (one on each hand) of the patients with Parkinson's disease (PD) and a non-PD control group. Subjects were asked to perform three of the upper extremity motor function tasks from the Unified Parkinson's Disease Rating Scale (UPDRS) test. The tasks were: 1) finger tapping, 2) opening and closing of palms, and 3) pronation-supination movements of the forearms. The inertia signals were wirelessly received and stored on a computer for further off-line analysis. Various features such as range, standard deviation, entropy, time to accomplish the task, and maximum frequency present in the signal were extracted and compared. The results showed that among the studied population, "standard deviation", "range", "entropy", "time" and "max frequency" are the best to worst features, respectively, to distinguish between the non-PD and PD subjects. Furthermore, using the mentioned features, it is more probable to distinguish between the non-PD and PD subjects from tasks 2 and 3 as opposed to task 1.
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Jia
authors.forename: Nathalie
authors.initials: N
authors.lastname: Duroseau
authors.forename: Vivian
authors.initials: V
authors.lastname: Chan
authors.forename: Christina
authors.initials: C
authors.lastname: Ciraco
authors.forename: Rui
authors.initials: R
authors.lastname: Wang
authors.forename: Sarah Mostafa
authors.initials: SM
authors.lastname: Nia
authors.forename: Kayla
authors.initials: K
authors.lastname: Ho
authors.forename: John P
authors.initials: JP
authors.lastname: Govindavari
authors.forename: Farshid
authors.initials: F
authors.lastname: Delgosha
authors.forename: Thomas
authors.initials: T
authors.lastname: Chan
authors.forename: Kathleen Mangunay
authors.initials: KM
authors.lastname: Pergament
authors.forename: Bhuma
authors.initials: B
authors.lastname: Krishnamachari
authors.forename: Aydin
authors.initials: A
authors.lastname: Farajidavar
mesh_terms: D061725:Accelerometry; D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008875:Middle Aged; D010300:Parkinson Disease / Q000503:physiopathology*; D012720:Severity of Illness Index; D013647:Task Performance and Analysis; D014953:Wrist / Q000503:physiopathology*