Ground reaction forces in locomoting hemi-parkinsonian rats: a definitive test for impairments and compensations.
Identifieur interne : 001710 ( PubMed/Corpus ); précédent : 001709; suivant : 001711Ground reaction forces in locomoting hemi-parkinsonian rats: a definitive test for impairments and compensations.
Auteurs : G D Muir ; I Q WhishawSource :
- Experimental brain research [ 0014-4819 ] ; 1999.
English descriptors
- KwdEn :
- Adaptation, Physiological (physiology), Animals, Corpus Striatum (metabolism), Corpus Striatum (physiopathology), Dopamine (deficiency), Extremities (physiopathology), Female, Gait (physiology), Gravitation, Motor Activity (physiology), Oxidopamine (pharmacology), Parkinson Disease, Secondary (chemically induced), Parkinson Disease, Secondary (physiopathology), Rats, Rats, Long-Evans, Reference Values, Substantia Nigra (drug effects), Substantia Nigra (physiopathology).
- MESH :
- chemical , deficiency : Dopamine.
- chemically induced : Parkinson Disease, Secondary.
- drug effects : Substantia Nigra.
- metabolism : Corpus Striatum.
- chemical , pharmacology : Oxidopamine.
- physiology : Adaptation, Physiological, Gait, Motor Activity.
- physiopathology : Corpus Striatum, Extremities, Parkinson Disease, Secondary, Substantia Nigra.
- Animals, Female, Gravitation, Rats, Rats, Long-Evans, Reference Values.
Abstract
Hemi-parkinsonian rats have preserved postural reflexes but are impaired in initiation of voluntary movements. Surprisingly, these rats can walk and run, suggesting that they can access some compensatory strategy to overcome the rigidity in their impaired limbs. The purpose of the present experiment was to investigate the locomotor compensations made by hemi-parkinsonian rats by measuring the forces exerted by the limbs on the ground throughout the stride during trotting. Rats with unilateral dopamine depletion produced by injection of 6-hydroxydopamine into the nigrostriatal bundle were trained to run back and forth in an alley for food reinforcement. Ground reaction forces were measured in three orthogonal directions using a force plate embedded in the runway. Rats were also videotaped so that limb movements were synchronized with force recordings. Although locomotion was obviously impaired, the affected limbs could support weight and provide some braking forces. In addition, the impaired hindlimb provided significant propulsive force, and a relatively large laterally directed force. Analysis of vertical movement of the centre of mass suggested that the impaired hindlimb was being used partly as a spring. The most significant abnormalities were seen during the diagonal couplet of the impaired forelimb and the unimpaired hindlimb, partly reflecting the important compensatory role of the unimpaired hindlimb. These results demonstrate that this method is useful in the analysis of hemi-parkinsonian gait and provide insights as to how rats can use an impaired limb to produce weight support and propulsion.
PubMed: 10382617
Links to Exploration step
pubmed:10382617Le document en format XML
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Surprisingly, these rats can walk and run, suggesting that they can access some compensatory strategy to overcome the rigidity in their impaired limbs. The purpose of the present experiment was to investigate the locomotor compensations made by hemi-parkinsonian rats by measuring the forces exerted by the limbs on the ground throughout the stride during trotting. Rats with unilateral dopamine depletion produced by injection of 6-hydroxydopamine into the nigrostriatal bundle were trained to run back and forth in an alley for food reinforcement. Ground reaction forces were measured in three orthogonal directions using a force plate embedded in the runway. Rats were also videotaped so that limb movements were synchronized with force recordings. Although locomotion was obviously impaired, the affected limbs could support weight and provide some braking forces. In addition, the impaired hindlimb provided significant propulsive force, and a relatively large laterally directed force. Analysis of vertical movement of the centre of mass suggested that the impaired hindlimb was being used partly as a spring. The most significant abnormalities were seen during the diagonal couplet of the impaired forelimb and the unimpaired hindlimb, partly reflecting the important compensatory role of the unimpaired hindlimb. These results demonstrate that this method is useful in the analysis of hemi-parkinsonian gait and provide insights as to how rats can use an impaired limb to produce weight support and propulsion.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">10382617</PMID><DateCreated><Year>1999</Year><Month>08</Month><Day>03</Day></DateCreated><DateCompleted><Year>1999</Year><Month>08</Month><Day>03</Day></DateCompleted><DateRevised><Year>2013</Year><Month>12</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0014-4819</ISSN><JournalIssue CitedMedium="Print"><Volume>126</Volume><Issue>3</Issue><PubDate><Year>1999</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Experimental brain research</Title><ISOAbbreviation>Exp Brain Res</ISOAbbreviation></Journal><ArticleTitle>Ground reaction forces in locomoting hemi-parkinsonian rats: a definitive test for impairments and compensations.</ArticleTitle><Pagination><MedlinePgn>307-14</MedlinePgn></Pagination><Abstract><AbstractText>Hemi-parkinsonian rats have preserved postural reflexes but are impaired in initiation of voluntary movements. Surprisingly, these rats can walk and run, suggesting that they can access some compensatory strategy to overcome the rigidity in their impaired limbs. The purpose of the present experiment was to investigate the locomotor compensations made by hemi-parkinsonian rats by measuring the forces exerted by the limbs on the ground throughout the stride during trotting. Rats with unilateral dopamine depletion produced by injection of 6-hydroxydopamine into the nigrostriatal bundle were trained to run back and forth in an alley for food reinforcement. Ground reaction forces were measured in three orthogonal directions using a force plate embedded in the runway. Rats were also videotaped so that limb movements were synchronized with force recordings. Although locomotion was obviously impaired, the affected limbs could support weight and provide some braking forces. In addition, the impaired hindlimb provided significant propulsive force, and a relatively large laterally directed force. Analysis of vertical movement of the centre of mass suggested that the impaired hindlimb was being used partly as a spring. The most significant abnormalities were seen during the diagonal couplet of the impaired forelimb and the unimpaired hindlimb, partly reflecting the important compensatory role of the unimpaired hindlimb. These results demonstrate that this method is useful in the analysis of hemi-parkinsonian gait and provide insights as to how rats can use an impaired limb to produce weight support and propulsion.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Muir</LastName><ForeName>G D</ForeName><Initials>GD</Initials><AffiliationInfo><Affiliation>Department of Veterinary Physiological Sciences, University of Saskatchewan, Saskatooon, Canada. muir@admin3.usask.ca</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Whishaw</LastName><ForeName>I Q</ForeName><Initials>IQ</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Exp Brain Res</MedlineTA><NlmUniqueID>0043312</NlmUniqueID><ISSNLinking>0014-4819</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>8HW4YBZ748</RegistryNumber><NameOfSubstance UI="D016627">Oxidopamine</NameOfSubstance></Chemical><Chemical><RegistryNumber>VTD58H1Z2X</RegistryNumber><NameOfSubstance UI="D004298">Dopamine</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><CitationSubset>S</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000222" MajorTopicYN="N">Adaptation, Physiological</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D000818" MajorTopicYN="N">Animals</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D003342" MajorTopicYN="N">Corpus Striatum</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000503" MajorTopicYN="N">physiopathology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D004298" MajorTopicYN="N">Dopamine</DescriptorName><QualifierName UI="Q000172" MajorTopicYN="N">deficiency</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D005121" MajorTopicYN="N">Extremities</DescriptorName><QualifierName UI="Q000503" MajorTopicYN="N">physiopathology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D005260" MajorTopicYN="N">Female</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005684" MajorTopicYN="N">Gait</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006112" MajorTopicYN="N">Gravitation</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D009043" MajorTopicYN="N">Motor Activity</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D016627" MajorTopicYN="N">Oxidopamine</DescriptorName><QualifierName UI="Q000494" MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010302" MajorTopicYN="N">Parkinson Disease, Secondary</DescriptorName><QualifierName UI="Q000139" MajorTopicYN="N">chemically induced</QualifierName><QualifierName UI="Q000503" MajorTopicYN="Y">physiopathology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D051381" MajorTopicYN="N">Rats</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D020318" MajorTopicYN="N">Rats, Long-Evans</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012016" MajorTopicYN="N">Reference Values</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013378" MajorTopicYN="N">Substantia Nigra</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName><QualifierName UI="Q000503" MajorTopicYN="N">physiopathology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>1999</Year><Month>6</Month><Day>26</Day></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>1999</Year><Month>6</Month><Day>26</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>1999</Year><Month>6</Month><Day>26</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">10382617</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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