Diagnostic and pathophysiological aspects of psychogenic tremors

Movement Disorders : Official Journal of the Movement Disorder Society
G DeuschlC Scheidt

Abstract

Psychogenic tremor has become a rare movement disorder. Twenty-five patients from our movement disorder unit presented either with obviously nonorganic body shaking during stance or with extremity tremors. A sudden onset and a variable but rarely remitting course of the condition was common. The "coactivation sign of psychogenic tremor" and absent finger tremor were the most consistent criteria to separate them from organic tremors. Quantitative analysis of tremor shows decreasing amplitudes in most organic tremors when the extremity is loaded with additional weights. In contrast, we found an increase of tremor amplitude for most of the cases with psychogenic tremor. This might be caused by increased coactivation to maintain the oscillation. These clinical and electrophysiological features suggest a clonus mechanism induced by coactivation as the pathophysiological basis of psychogenic extremity tremor. Psychiatric evaluation did not show overt signs of hysteria for the majority of the patients. However, we found depression and functional somatic or psychosomatic conditions to be frequent among the patients. A reduced ability to cope with stressful situations may play a significant role. The clinical course of the condition is ...Continue Reading

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Jan 14, 2000·Movement Disorders : Official Journal of the Movement Disorder Society·W G OndoW D Le
Aug 2, 2001·Movement Disorders : Official Journal of the Movement Disorder Society·P Brown, P D Thompson
May 22, 2001·Muscle & Nerve·G DeuschlP Krack
Jan 19, 2013·Experimental Brain Research·Sarah M Kranick, Mark Hallett
Apr 10, 2007·Journal of Neurology·Kailash P Bhatia, Susanne A Schneider
Jul 11, 2006·Current Neurology and Neuroscience Reports·Mark Hallett
Sep 24, 2013·Current Neurology and Neuroscience Reports·Arpan R MehtaAnette E Schrag
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Sep 5, 2001·Neurologic Clinics·T A Zesiewicz, R A Hauser
Jun 1, 2002·Parkinsonism & Related Disorders·A PezziniA Padovani
Apr 23, 2013·Lancet Neurology·Raja Mehanna, Joseph Jankovic
Dec 19, 2008·European Journal of Human Genetics : EJHG·Delia LorenzAlexandra Dürr
Feb 16, 2011·Seminars in Neurology·Andreas Puschmann, Zbigniew K Wszolek
Feb 17, 2000·The New England Journal of Medicine·G Deuschl
Jan 12, 2001·Clinical Neuropharmacology·J D O'Sullivan, A J Lees
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Dec 14, 2005·Postgraduate Medical Journal·R Bhidayasiri
Oct 13, 2007·BioPsychoSocial Medicine·Koreaki SugimotoPio Conti
May 14, 2004·CNS Drugs·Madhavi Thomas, Joseph Jankovic
Sep 14, 2013·Journal of Neurology, Neurosurgery, and Psychiatry·Jeannette GelauffAlan Carson
May 1, 2012·Journal of Movement Disorders·Jong Sam Baik, Myung Sik Lee
Oct 1, 2011·Journal of Movement Disorders·Suk Yoon LeeSang Jin Kim
May 1, 2011·Journal of Movement Disorders·Pramod Kumar Pal
Oct 1, 2010·Journal of Movement Disorders·Young-Hee SungDong-Jin Shin
May 1, 2009·Journal of Movement Disorders·Suk Yun KangYoung Ho Sohn
Nov 30, 2014·Neurologic Clinics·Mary Ann Thenganatt, Joseph Jankovic
Oct 13, 2014·Neurophysiologie clinique = Clinical neurophysiology·E Apartis
Feb 18, 2016·Movement Disorders : Official Journal of the Movement Disorder Society·Petra SchwingenschuhMark J Edwards
Nov 26, 2003·Movement Disorders : Official Journal of the Movement Disorder Society·Sibel OzekmekçiCengiz Yalçinkaya
Jan 14, 2016·The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques·Nitish KamblePramod Kumar Pal
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Jun 27, 2009·Neurologic Clinics·Elizabeth L Peckham, Mark Hallett
Jul 3, 2007·Journal of the Neurological Sciences·Christopher KenneyJoseph Jankovic
May 1, 2007·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Mark Hallett
Feb 11, 2009·Movement Disorders : Official Journal of the Movement Disorder Society·Sibel ErtanCigdem Ozkara
Oct 8, 2005·Movement Disorders : Official Journal of the Movement Disorder Society·Sandrine BenaderetteMarie Vidailhet
Nov 14, 2007·Movement Disorders : Official Journal of the Movement Disorder Society·Valérie FraixFrançois Cassim
Aug 4, 2007·Movement Disorders : Official Journal of the Movement Disorder Society·Hatice KumruJosep Valls-Sole
Oct 1, 2011·Movement Disorders : Official Journal of the Movement Disorder Society·Petra SchwingenschuhMark J Edwards

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