Correction for the influence of background muscle activity on stretch reflex amplitudes
Identifieur interne : 002488 ( Main/Exploration ); précédent : 002487; suivant : 002489Correction for the influence of background muscle activity on stretch reflex amplitudes
Auteurs : Bastiaan R. Bloem ; J. Gert Van Dijk ; Dennis J. Beckley [États-Unis] ; Aeilko H. Zwinderman ; Michael P. Remler [États-Unis] ; Raymund A. C. RoosSource :
- Journal of Neuroscience Methods [ 0165-0270 ] ; 1992.
Abstract
Background muscle activity (BGR) exerts a strong influence on stretch reflex amplitudes. While it is considered important to correct for this influence, which method best able to eliminate the effects of BGR remains unknown. We have therefore compared one previously described and one novel correction method which respectively consisted of calculating (1) the difference between reflex amplitude and BGR, and (2) the ratio of reflex amplitude to BGR. These correction methods were evaluated in a group of 23 healthy individuals. BGR and stretch reflexes were recorded from the gastrocnemius muscle of standing subjects who received sudden toe-up perturbations of a supporting platform upon which they were standing. Calculation of differences markedly reduced the influence of BGR on stretch reflex amplitudes in most, although not all, subjects. Calculation of ratios failed to correct for BGR in most subjects and caused a net increase in the influence of BGR on stretch reflex amplitudes. Because both correction methods insufficiently corrected for BGR in normal subjects, we introduce the use of analysis of covariance (ANCOVA) to reliably remove the influence of BGR on stretch reflex amplitudes. The use of ANCOVA is exemplified by showing that stretch reflex amplitudes are enhanced in patients with Parkinson's disease even if the influence of high BGR is completely taken into account.
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DOI: 10.1016/0165-0270(93)90152-H
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Remler</name></author><author><name sortKey="Roos, Raymund A C" sort="Roos, Raymund A C" uniqKey="Roos R" first="Raymund A. C." last="Roos">Raymund A. C. Roos</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:CA709EF0B1D998742B7AF3B74D11951729B7C5AD</idno><date when="1993" year="1993">1993</date><idno type="doi">10.1016/0165-0270(93)90152-H</idno><idno type="url">https://api.istex.fr/document/CA709EF0B1D998742B7AF3B74D11951729B7C5AD/fulltext/pdf</idno><idno type="wicri:Area/Main/Corpus">002529</idno><idno type="wicri:Area/Main/Curation">002197</idno><idno type="wicri:Area/Main/Exploration">002488</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Correction for the influence of background muscle activity on stretch reflex amplitudes</title><author><name sortKey="Bloem, Bastiaan R" sort="Bloem, Bastiaan R" uniqKey="Bloem B" first="Bastiaan R." last="Bloem">Bastiaan R. Bloem</name><affiliation><wicri:noCountry code="subField">Leiden The Netherlands</wicri:noCountry></affiliation></author><author><name sortKey="Van Dijk, J Gert" sort="Van Dijk, J Gert" uniqKey="Van Dijk J" first="J. Gert" last="Van Dijk">J. Gert Van Dijk</name><affiliation><wicri:noCountry code="subField">Leiden The Netherlands</wicri:noCountry></affiliation></author><author><name sortKey="Beckley, Dennis J" sort="Beckley, Dennis J" uniqKey="Beckley D" first="Dennis J." last="Beckley">Dennis J. Beckley</name><affiliation wicri:level="2"><country>États-Unis</country><placeName><region type="state">Californie</region></placeName><wicri:cityArea>Department of Neurology, School of Medicine, University of California, Davis</wicri:cityArea></affiliation></author><author><name sortKey="Zwinderman, Aeilko H" sort="Zwinderman, Aeilko H" uniqKey="Zwinderman A" first="Aeilko H." last="Zwinderman">Aeilko H. Zwinderman</name><affiliation><wicri:noCountry code="subField">Leiden The Netherlands</wicri:noCountry></affiliation></author><author><name sortKey="Remler, Michael P" sort="Remler, Michael P" uniqKey="Remler M" first="Michael P." last="Remler">Michael P. Remler</name><affiliation wicri:level="2"><country>États-Unis</country><placeName><region type="state">Californie</region></placeName><wicri:cityArea>Department of Neurology, School of Medicine, University of California, Davis</wicri:cityArea></affiliation></author><author><name sortKey="Roos, Raymund A C" sort="Roos, Raymund A C" uniqKey="Roos R" first="Raymund A. C." last="Roos">Raymund A. C. Roos</name><affiliation><wicri:noCountry code="subField">Leiden The Netherlands</wicri:noCountry></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Neuroscience Methods</title><title level="j" type="abbrev">NSM</title><idno type="ISSN">0165-0270</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1992">1992</date><biblScope unit="volume">46</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="167">167</biblScope><biblScope unit="page" to="174">174</biblScope></imprint><idno type="ISSN">0165-0270</idno></series><idno type="istex">CA709EF0B1D998742B7AF3B74D11951729B7C5AD</idno><idno type="DOI">10.1016/0165-0270(93)90152-H</idno><idno type="PII">0165-0270(93)90152-H</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0165-0270</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Background muscle activity (BGR) exerts a strong influence on stretch reflex amplitudes. While it is considered important to correct for this influence, which method best able to eliminate the effects of BGR remains unknown. We have therefore compared one previously described and one novel correction method which respectively consisted of calculating (1) the difference between reflex amplitude and BGR, and (2) the ratio of reflex amplitude to BGR. These correction methods were evaluated in a group of 23 healthy individuals. BGR and stretch reflexes were recorded from the gastrocnemius muscle of standing subjects who received sudden toe-up perturbations of a supporting platform upon which they were standing. Calculation of differences markedly reduced the influence of BGR on stretch reflex amplitudes in most, although not all, subjects. Calculation of ratios failed to correct for BGR in most subjects and caused a net increase in the influence of BGR on stretch reflex amplitudes. Because both correction methods insufficiently corrected for BGR in normal subjects, we introduce the use of analysis of covariance (ANCOVA) to reliably remove the influence of BGR on stretch reflex amplitudes. The use of ANCOVA is exemplified by showing that stretch reflex amplitudes are enhanced in patients with Parkinson's disease even if the influence of high BGR is completely taken into account.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Californie</li></region></list><tree><noCountry><name sortKey="Bloem, Bastiaan R" sort="Bloem, Bastiaan R" uniqKey="Bloem B" first="Bastiaan R." last="Bloem">Bastiaan R. Bloem</name><name sortKey="Roos, Raymund A C" sort="Roos, Raymund A C" uniqKey="Roos R" first="Raymund A. C." last="Roos">Raymund A. C. Roos</name><name sortKey="Van Dijk, J Gert" sort="Van Dijk, J Gert" uniqKey="Van Dijk J" first="J. Gert" last="Van Dijk">J. Gert Van Dijk</name><name sortKey="Zwinderman, Aeilko H" sort="Zwinderman, Aeilko H" uniqKey="Zwinderman A" first="Aeilko H." last="Zwinderman">Aeilko H. Zwinderman</name></noCountry><country name="États-Unis"><region name="Californie"><name sortKey="Beckley, Dennis J" sort="Beckley, Dennis J" uniqKey="Beckley D" first="Dennis J." last="Beckley">Dennis J. Beckley</name></region><name sortKey="Remler, Michael P" sort="Remler, Michael P" uniqKey="Remler M" first="Michael P." last="Remler">Michael P. Remler</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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