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Three patients were reclassified as pure psychogenic parkinsonism (PP), 6 with a form of combined psychogenic parkinsonism and Parkinson's disease (PP + PD), and none with pure Parkinson's disease (PD). Electrophysiological recordings showed the characteristics of psychogenic tremor in 5 of 7 patients with tremor. In two of these 5, PD tremor was also recorded. SPECT scan results were abnormal in five of 9 patients. In one case of clinically suspected PP + PD, SPECT scan results were normal. Long\u2010term follow\u2010up supported the final diagnosis of PP (initial clinical misdiagnosis). Electrophysiology contributes to the clinical diagnosis of psychogenic tremor and may help confirm associated organic PD tremor. [<jats:sup>123<\/jats:sup>I]\u2010FP\u2010CIT SPECT is a robust test to ascertain dopaminergic denervation and increase the confidence of the clinical and electrophysiological diagnosis of associated PD. A combination of clinical, electrophysiological, and [<jats:sup>123<\/jats:sup>I]\u2010FP\u2010CIT SPECT scan explorations improves diagnostic accuracy in order to distinguish PP from PP + PD. \u00a9 2005 Movement Disorder Society<\/jats:p>","DOI":"10.1002\/mds.20720","type":"journal-article","created":{"date-parts":[[2005,10,6]],"date-time":"2005-10-06T19:48:52Z","timestamp":1128628132000},"page":"310-317","source":"Crossref","is-referenced-by-count":70,"title":["Psychogenic parkinsonism: A combination of clinical, electrophysiological, and [<sup>123<\/sup>I]\u2010FP\u2010CIT SPECT scan explorations improves diagnostic accuracy"],"prefix":"10.1002","volume":"21","author":[{"given":"Sandrine","family":"Benaderette","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paolo 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