PMID: 8599770Nov 1, 1995Paper

Levodopa reduces muscle tone and lower extremity tremor in Parkinson's disease

The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques
A BurleighJ Frank

Abstract

We have quantified the effects of levodopa treatment in Parkinsonian subjects during maintained stance. Electromyographic muscle activity during quiet stance was assessed in subjects with Parkinson's disease, who exhibited a fluctuating response to levodopa, and in age-matched control subjects. Stance stability was also assessed from mean displacement and velocity of the center of pressure excursions during stance. Lower extremity and trunk muscles showed high amplitude activity in all Parkinson's subjects when "off", and a 4-5 Hz tremor in three of these subjects. When "on", the amplitude of muscle activity was reduced in the distal muscles more than the proximal, while tremor was suppressed in all muscles. Corresponding to the excessive muscle activity, the Parkinson's subjects had increased velocity and variability of velocity in the anterior-posterior center of foot pressure excursions, but the mean displacement of the center of pressure excursion was not different from the controls. The velocity of center of pressure excursions in the Parkinson's subjects "on", approached those of the control subjects suggesting that the excessive distal muscle amplitude and tremor contributed to the high velocity of the center of pressure...Continue Reading

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Citations

Aug 28, 2004·Journal of Neurophysiology·Christoph Maurer, Robert J Peterka
Oct 26, 2016·Movement Disorders : Official Journal of the Movement Disorder Society·Michele TinazziAlfonso Fasano
Nov 21, 2008·European Journal of Neurology : the Official Journal of the European Federation of Neurological Societies·M MatinolliV V Myllylä
Sep 26, 2014·Journal of Neurophysiology·T A BoonstraH van der Kooij
May 14, 2005·Experimental Brain Research·Natalia DounskaiaGeorge E Stelmach
Jul 5, 2007·Experimental Brain Research·J W BłaszczykG Opala
Nov 30, 2007·Movement Disorders : Official Journal of the Movement Disorder Society·Graham KerrPeter Silburn
Aug 9, 2013·Movement Disorders : Official Journal of the Movement Disorder Society·Bernadette SchoneburgJohn G Nutt
Feb 13, 2009·Expert Review of Neurotherapeutics·Yvette A M GrimbergenBastiaan R Bloem

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