title: Electrophysiological aids in distinguishing organic from psychogenic tremor.
abstract: The clinical differentiation of tremors of organic and psychogenic origin can be difficult. We describe a patient with unilateral upper limb tremor that was initially considered to have a psychogenic cause, but subsequent frequency analysis of EMG signals and accelerometer recordings indicated that the tremor was organic in nature. An ischemic lesion in the contralateral lentiform nucleus found on MRI supported this conclusion. Quantitative electrophysiologic studies may thus be useful in distinguishing organic from psychogenic tremor.
authors.affiliation: Human Movement and Balance Unit, Institute of Neurology, London, UK.
authors.forename: J H
authors.initials: JH
authors.lastname: McAuley
authors.forename: J C
authors.initials: JC
authors.lastname: Rothwell
authors.forename: C D
authors.initials: CD
authors.lastname: Marsden
authors.forename: L J
authors.initials: LJ
authors.lastname: Findley
mesh_terms: D000368:Aged; D001921:Brain / Q000473:pathology; D003937:Diagnosis, Differential; D004568:Electrodiagnosis; D004576:Electromyography; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D011602:Psychophysiologic Disorders / Q000175:diagnosis*; D014202:Tremor / Q000175:diagnosis*