Postural reactions to neck vibration in Parkinson's disease
Identifieur interne : 001227 ( Main/Exploration ); précédent : 001226; suivant : 001228Postural reactions to neck vibration in Parkinson's disease
Auteurs : Peter Valkovi [Allemagne, Slovaquie] ; Siegbert Krafczyk [Allemagne] ; Marian Šaling [Slovaquie] ; Ján Benetin [Slovaquie] ; Kai Bötzel [Allemagne]Source :
- Movement Disorders [ 0885-3185 ] ; 2006-01.
English descriptors
Abstract
To test the hypothesis that reduced reactions to proprioceptive input signals contribute to postural instability in Parkinson's disease (PD), pulses of mechanical vibration were applied to the neck muscles of PD patients and healthy controls. This stimulus elicits postural reactions in standing subjects. Participating were 13 moderately affected PD patients, 13 severely affected PD patients, and 13 age‐matched healthy subjects. Patients were tested on and off medication. Three‐second‐long pulses of vibration were regularly (10 times) applied to the posterior neck muscles while subjects kept their eyes open or closed. Postural responses to the stimuli were measured by static posturography. No intergroup difference in the pattern and latencies of responses was found. However, the amplitudes of the postural reactions (shift of center of foot pressure) were significantly larger in advanced PD patients; those of moderately affected PD patients did not differ from those of control subjects. Moreover, the size of postural responses in both latter groups decreased across the trial contrary to that of advanced PD patients. Comparison of the measures during on and off testing revealed no significant differences. These results indicate that neither afferent proprioceptive deficits nor central integrative functions but rather scaling and habituation of erroneous proprioceptive information are disturbed in the postural control of advanced PD. Nondopaminergic structures seem to be responsible for this impairment. © 2005 Movement Disorder Society
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DOI: 10.1002/mds.20679
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Disord.</title><idno type="ISSN">0885-3185</idno><idno type="eISSN">1531-8257</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2006-01">2006-01</date><biblScope unit="volume">21</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="59">59</biblScope><biblScope unit="page" to="65">65</biblScope></imprint><idno type="ISSN">0885-3185</idno></series><idno type="istex">54B42DF1F31AE97DEB0488B7C8CA979FF5ED0ADF</idno><idno type="DOI">10.1002/mds.20679</idno><idno type="ArticleID">MDS20679</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0885-3185</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Parkinson's disease</term><term>neck muscle vibration</term><term>postural instability</term><term>posture</term><term>proprioception</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">To test the hypothesis that reduced reactions to proprioceptive input signals contribute to postural instability in Parkinson's disease (PD), pulses of mechanical vibration were applied to the neck muscles of PD patients and healthy controls. This stimulus elicits postural reactions in standing subjects. Participating were 13 moderately affected PD patients, 13 severely affected PD patients, and 13 age‐matched healthy subjects. Patients were tested on and off medication. Three‐second‐long pulses of vibration were regularly (10 times) applied to the posterior neck muscles while subjects kept their eyes open or closed. Postural responses to the stimuli were measured by static posturography. No intergroup difference in the pattern and latencies of responses was found. However, the amplitudes of the postural reactions (shift of center of foot pressure) were significantly larger in advanced PD patients; those of moderately affected PD patients did not differ from those of control subjects. Moreover, the size of postural responses in both latter groups decreased across the trial contrary to that of advanced PD patients. Comparison of the measures during on and off testing revealed no significant differences. These results indicate that neither afferent proprioceptive deficits nor central integrative functions but rather scaling and habituation of erroneous proprioceptive information are disturbed in the postural control of advanced PD. Nondopaminergic structures seem to be responsible for this impairment. © 2005 Movement Disorder Society</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Slovaquie</li></country><region><li>Bavière</li><li>District de Haute-Bavière</li></region><settlement><li>Munich</li></settlement></list><tree><country name="Allemagne"><region name="Bavière"><name sortKey="Valkovi, Peter" sort="Valkovi, Peter" uniqKey="Valkovi P" first="Peter" last="Valkovi">Peter Valkovi</name></region><name sortKey="Botzel, Kai" sort="Botzel, Kai" uniqKey="Botzel K" first="Kai" last="Bötzel">Kai Bötzel</name><name sortKey="Krafczyk, Siegbert" sort="Krafczyk, Siegbert" uniqKey="Krafczyk S" first="Siegbert" last="Krafczyk">Siegbert Krafczyk</name></country><country name="Slovaquie"><noRegion><name sortKey="Valkovi, Peter" sort="Valkovi, Peter" uniqKey="Valkovi P" first="Peter" last="Valkovi">Peter Valkovi</name></noRegion><name sortKey="Benetin, Jan" sort="Benetin, Jan" uniqKey="Benetin J" first="Ján" last="Benetin">Ján Benetin</name><name sortKey="Saling, Marian" sort="Saling, Marian" uniqKey="Saling M" first="Marian" last="Šaling">Marian Šaling</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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