title: Accelerometry to distinguish psychogenic from essential or parkinsonian tremor.
abstract: The authors measured postural wrist tremor with accelerometry in patients with psychogenic (n = 6), essential (n = 11), and parkinsonian (n = 12) tremor. Tremor was measured in one hand, while the other hand either rested or tapped to an auditory stimulus at 3 and 4 or 5 Hz. Psychogenic tremors showed larger tremor frequency changes and higher intraindividual variability while tapping. Accelerometry may differentiate psychogenic from essential and parkinsonian tremor.
authors.affiliation: Human Motor Control Section, Medical Neurology Branch, National Institute of Neurological Disorders and Stroke, Bethesda, MD 20892-1428, USA.
authors.forename: K E
authors.initials: KE
authors.lastname: Zeuner
authors.forename: R O
authors.initials: RO
authors.lastname: Shoge
authors.forename: S R
authors.initials: SR
authors.lastname: Goldstein
authors.forename: J M
authors.initials: JM
authors.lastname: Dambrosia
authors.forename: M
authors.initials: M
authors.lastname: Hallett
mesh_terms: D000054:Acceleration; D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D004576:Electromyography; D004594:Electrophysiology / Q000379:methods*; D020329:Essential Tremor / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000150:complications / Q000175:diagnosis*; D011602:Psychophysiologic Disorders / Q000175:diagnosis*; D014202:Tremor / Q000175:diagnosis* / Q000209:etiology / Q000523:psychology