Asymmetrical Effect of Levodopa on the Neural Activity of Motor Regions in PD
Identifieur interne : 000B38 ( Main/Exploration ); précédent : 000B37; suivant : 000B39Asymmetrical Effect of Levodopa on the Neural Activity of Motor Regions in PD
Auteurs : Kristina Martinu [Canada] ; Atsuko Nagano-Saito [Canada] ; Stuart Fogel [Canada] ; Oury Monchi [Canada]Source :
- PLoS ONE [ 1932-6203 ] ; 2014.
English descriptors
- KwdEn :
- Aged, Antiparkinson Agents (pharmacology), Antiparkinson Agents (therapeutic use), Brain Mapping, Cerebellum (drug effects), Cerebellum (pathology), Cerebellum (physiopathology), Female, Hand (pathology), Humans, Levodopa (pharmacology), Levodopa (therapeutic use), Magnetic Resonance Imaging, Male, Middle Aged, Movement (drug effects), Parkinson Disease (drug therapy), Parkinson Disease (pathology), Parkinson Disease (physiopathology).
- MESH :
- chemical , pharmacology : Antiparkinson Agents, Levodopa.
- chemical , therapeutic use : Antiparkinson Agents, Levodopa.
- drug effects : Cerebellum, Movement.
- drug therapy : Parkinson Disease.
- pathology : Cerebellum, Hand, Parkinson Disease.
- physiopathology : Cerebellum, Parkinson Disease.
- Aged, Brain Mapping, Female, Humans, Magnetic Resonance Imaging, Male, Middle Aged.
Abstract
Parkinson's disease (PD) is a neurodegenerative illness often characterized by asymmetrical symptoms. However, the reason for this asymmetry and the cerebral correlates underlying symptom asymmetry are still not well understood. Furthermore, the effects of levodopa on the cerebral correlates of disease asymmetry have not been investigated. In this study, right-handed PD patients performed self-initiated, externally triggered and repetitive control finger movements with both their right and left hands during functional magnetic resonance imaging (fMRI) to investigate asymmetrical effects of levodopa on the hemodynamic correlates of finger movements. Patients completed two experimental sessions OFF and ON medication after a minimum of 12 hours medication withdrawal. We compared the effect of levodopa on the neural activation patterns underlying the execution of both the more affected and less affected hand for self-initiated and externally triggered movements. Our results show that levodopa led to larger differences in cerebral activity for movements of the more affected, left side: there were significant differences in activity after levodopa administration in regions of the motor cortico-striatal network when patients performed self-initiated and externally triggered movements with their left hand. By contrast, when patients used their right hand, levodopa led to differences in cerebellar activity only. As our patients were affected more severely on their left side, we propose that levodopa may help provide additional dopaminergic input, improving movements for the more severely affected side. These results suggest that the impact of reduced dopamine in the cortico-striatal system and the action of levodopa is not symmetrical.
Url:
DOI: 10.1371/journal.pone.0111600
PubMed: 25369523
PubMed Central: 4219727
Affiliations:
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uniqKey="Fogel S" first="Stuart" last="Fogel">Stuart Fogel</name><affiliation wicri:level="1"><nlm:aff id="aff1"><addr-line>Centre de Recherche de l′Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada</addr-line></nlm:aff><country xml:lang="fr">Canada</country><wicri:regionArea>Centre de Recherche de l′Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec</wicri:regionArea><wicri:noRegion>Quebec</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:aff id="aff2"><addr-line>Brain & Mind Institute, Department of Psychology, Western University, London, Ontario, Canada</addr-line></nlm:aff><country xml:lang="fr">Canada</country><wicri:regionArea>Brain & Mind Institute, Department of Psychology, Western University, London, Ontario</wicri:regionArea><wicri:noRegion>Ontario</wicri:noRegion></affiliation></author><author><name sortKey="Monchi, Oury" sort="Monchi, Oury" uniqKey="Monchi O" first="Oury" last="Monchi">Oury Monchi</name><affiliation wicri:level="1"><nlm:aff id="aff1"><addr-line>Centre de Recherche de l′Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada</addr-line></nlm:aff><country xml:lang="fr">Canada</country><wicri:regionArea>Centre de Recherche de l′Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec</wicri:regionArea><wicri:noRegion>Quebec</wicri:noRegion></affiliation><affiliation wicri:level="1"><nlm:aff id="aff3"><addr-line>Department of Radiology, Université de Montréal, Montreal, Quebec, Canada</addr-line></nlm:aff><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Radiology, Université de Montréal, Montreal, Quebec</wicri:regionArea><wicri:noRegion>Quebec</wicri:noRegion></affiliation></author></analytic><series><title level="j">PLoS ONE</title><idno type="eISSN">1932-6203</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" 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qualifier="drug effects" xml:lang="en"><term>Cerebellum</term><term>Movement</term></keywords><keywords scheme="MESH" qualifier="drug therapy" xml:lang="en"><term>Parkinson Disease</term></keywords><keywords scheme="MESH" qualifier="pathology" xml:lang="en"><term>Cerebellum</term><term>Hand</term><term>Parkinson Disease</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Cerebellum</term><term>Parkinson Disease</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Aged</term><term>Brain Mapping</term><term>Female</term><term>Humans</term><term>Magnetic Resonance Imaging</term><term>Male</term><term>Middle Aged</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Parkinson's disease (PD) is a neurodegenerative illness often characterized by asymmetrical symptoms. However, the reason for this asymmetry and the cerebral correlates underlying symptom asymmetry are still not well understood. Furthermore, the effects of levodopa on the cerebral correlates of disease asymmetry have not been investigated. In this study, right-handed PD patients performed self-initiated, externally triggered and repetitive control finger movements with both their right and left hands during functional magnetic resonance imaging (fMRI) to investigate asymmetrical effects of levodopa on the hemodynamic correlates of finger movements. Patients completed two experimental sessions OFF and ON medication after a minimum of 12 hours medication withdrawal. We compared the effect of levodopa on the neural activation patterns underlying the execution of both the more affected and less affected hand for self-initiated and externally triggered movements. Our results show that levodopa led to larger differences in cerebral activity for movements of the more affected, left side: there were significant differences in activity after levodopa administration in regions of the motor cortico-striatal network when patients performed self-initiated and externally triggered movements with their left hand. By contrast, when patients used their right hand, levodopa led to differences in cerebellar activity only. As our patients were affected more severely on their left side, we propose that levodopa may help provide additional dopaminergic input, improving movements for the more severely affected side. These results suggest that the impact of reduced dopamine in the cortico-striatal system and the action of levodopa is not symmetrical.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Djaldetti, R" uniqKey="Djaldetti R">R Djaldetti</name></author><author><name sortKey="Ziv, I" uniqKey="Ziv I">I Ziv</name></author><author><name sortKey="Melamed, E" uniqKey="Melamed E">E Melamed</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Hoehn, Mm" uniqKey="Hoehn M">MM Hoehn</name></author><author><name sortKey="Yahr, Md" uniqKey="Yahr M">MD Yahr</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Deecke, L" uniqKey="Deecke L">L Deecke</name></author><author><name sortKey="Scheid, P" uniqKey="Scheid P">P Scheid</name></author><author><name sortKey="Kornhuber, Hh" uniqKey="Kornhuber H">HH Kornhuber</name></author></analytic></biblStruct><biblStruct><analytic><author><name 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sortKey="Vingerhoets, G" uniqKey="Vingerhoets G">G Vingerhoets</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Buhmann, C" uniqKey="Buhmann C">C Buhmann</name></author><author><name sortKey="Glauche, V" uniqKey="Glauche V">V Glauche</name></author><author><name sortKey="Sturenburg, Hj" uniqKey="Sturenburg H">HJ Sturenburg</name></author><author><name sortKey="Oechsner, M" uniqKey="Oechsner M">M Oechsner</name></author><author><name sortKey="Weiller, C" uniqKey="Weiller C">C Weiller</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Duvoisin, Rc" uniqKey="Duvoisin R">RC Duvoisin</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Rodriguez, M" uniqKey="Rodriguez M">M Rodriguez</name></author><author><name sortKey="Lera, G" uniqKey="Lera G">G Lera</name></author><author><name sortKey="Vaamonde, J" uniqKey="Vaamonde J">J Vaamonde</name></author><author><name sortKey="Luquin, Mr" uniqKey="Luquin M">MR Luquin</name></author><author><name sortKey="Obeso, Ja" uniqKey="Obeso J">JA Obeso</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kumar, A" uniqKey="Kumar A">A Kumar</name></author><author><name sortKey="Mann, S" uniqKey="Mann S">S Mann</name></author><author><name sortKey="Sossi, V" uniqKey="Sossi V">V Sossi</name></author><author><name sortKey="Ruth, Tj" uniqKey="Ruth T">TJ Ruth</name></author><author><name sortKey="Stoessl, Aj" uniqKey="Stoessl A">AJ Stoessl</name></author></analytic></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Martinu, Kristina" sort="Martinu, Kristina" uniqKey="Martinu K" first="Kristina" last="Martinu">Kristina Martinu</name></noRegion><name sortKey="Fogel, Stuart" sort="Fogel, Stuart" uniqKey="Fogel S" first="Stuart" last="Fogel">Stuart Fogel</name><name sortKey="Fogel, Stuart" sort="Fogel, Stuart" uniqKey="Fogel S" first="Stuart" last="Fogel">Stuart Fogel</name><name sortKey="Monchi, Oury" sort="Monchi, Oury" uniqKey="Monchi O" first="Oury" last="Monchi">Oury Monchi</name><name sortKey="Monchi, Oury" sort="Monchi, Oury" uniqKey="Monchi O" first="Oury" last="Monchi">Oury Monchi</name><name sortKey="Nagano Saito, Atsuko" sort="Nagano Saito, Atsuko" uniqKey="Nagano Saito A" first="Atsuko" last="Nagano-Saito">Atsuko Nagano-Saito</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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