Accelerometry to distinguish psychogenic from essential or parkinsonian tremor.
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.
Zeuner
K E
KE
Human Motor Control Section, Medical Neurology Branch, National Institute of Neurological Disorders and Stroke, Bethesda, MD 20892-1428, USA.
Shoge
R O
RO
Goldstein
S R
SR
Dambrosia
J M
JM
Hallett
M
M
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