IMPACT OF PARKINSON'S DISEASE AND DOPAMINERGIC MEDICATION ON PROPRIOCEPTIVE PROCESSING
Identifieur interne : 000569 ( PascalFrancis/Corpus ); précédent : 000568; suivant : 000570IMPACT OF PARKINSON'S DISEASE AND DOPAMINERGIC MEDICATION ON PROPRIOCEPTIVE PROCESSING
Auteurs : D. Mongeon ; P. Blanchet ; J. MessierSource :
- Neuroscience [ 0306-4522 ] ; 2009.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Increasing evidence suggests that the pathophysiology of movement disorders in Parkinson's disease (PD) includes deficits in sensory processing and integration. However, the exact nature of these deficits and the ability of dopamine medication to correct them have not been thoroughly examined in previous studies. For instance, it remains unclear whether PD patients have globally impaired sensorimotor integration functions or selective deficiencies in processing proprioception. We evaluated the specific deficits of PD patients in sensorimotor integration and proprioceptive processing by testing their ability to perform three-dimensional (3D) reaching movements in four conditions in which the sensory signals defining target and hand positions (visual and/or proprioceptive) varied. Ten healthy subjects and 11 PD patients, ON dopamine medication and in the OFF state, were tested. PD patients in the OFF state showed a greater mean level of 3D errors relative to controls when the only available sensory information about target and hand position came from proprioception, but this difference did not reach significance. This indicates that deficient proprioception is not an early key feature of PD. Interestingly, the inaccuracies of a number of PD subjects further increased in the ON medicated state relative to healthy controls when reaching to proprioceptively-defined targets, and this between group difference was statistically significant. However, dopamine medication did not consistently degrade the reaching accuracy of PD patients, with both negative and positive effects on accuracy of reaching to proprioceptive-defined targets. Together, these findings indicate that dopamine replacement therapy not only did not normalize sensorimotor performance to the level of controls, but also induced deficits in the processing of proprioceptive information in some of the PD patients tested. Furthermore, the diversity of effects of medication on accuracy of reaching to proprioceptively-defined targets supports the idea that dysfunction of dopaminergic circuits within the basal ganglia is not primarily responsible for the proprioceptive processing deficits of PD patients.
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Format Inist (serveur)
NO : | PASCAL 09-0119781 INIST |
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ET : | IMPACT OF PARKINSON'S DISEASE AND DOPAMINERGIC MEDICATION ON PROPRIOCEPTIVE PROCESSING |
AU : | MONGEON (D.); BLANCHET (P.); MESSIER (J.) |
AF : | Département de Kinésiologie, Université de Montréal, 2100, boul. Édouard-Montpetit, bureau 8225/Montréal, Québec, QC H3T 1J4/Canada (1 aut., 3 aut.); Institut universitaire de gériatrie de Montréal, Université de Montréal, 4545, Chemin Queen-Mary/Montréal, Québec, H3W 1W4/Canada (1 aut., 3 aut.); Département de stomatologie, Université de Montréal, Pavillon Roger-Gaudry 2900, boul. Édouard-Montpetit/Montréal, Québec, H3T 1J4/Canada (2 aut.); Services de neurologie du Centre Hospitalier de l'Université de Montréal, Hôpital Notre-Dame, Pavillon DesChamps, 1560, rue Sherbrooke est/Montréal, Québec, H2L 4M1/Canada (2 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Neuroscience; ISSN 0306-4522; Coden NRSCDN; Royaume-Uni; Da. 2009; Vol. 158; No. 2; Pp. 426-440; Bibl. 1 p.3/4 |
LA : | Anglais |
EA : | Increasing evidence suggests that the pathophysiology of movement disorders in Parkinson's disease (PD) includes deficits in sensory processing and integration. However, the exact nature of these deficits and the ability of dopamine medication to correct them have not been thoroughly examined in previous studies. For instance, it remains unclear whether PD patients have globally impaired sensorimotor integration functions or selective deficiencies in processing proprioception. We evaluated the specific deficits of PD patients in sensorimotor integration and proprioceptive processing by testing their ability to perform three-dimensional (3D) reaching movements in four conditions in which the sensory signals defining target and hand positions (visual and/or proprioceptive) varied. Ten healthy subjects and 11 PD patients, ON dopamine medication and in the OFF state, were tested. PD patients in the OFF state showed a greater mean level of 3D errors relative to controls when the only available sensory information about target and hand position came from proprioception, but this difference did not reach significance. This indicates that deficient proprioception is not an early key feature of PD. Interestingly, the inaccuracies of a number of PD subjects further increased in the ON medicated state relative to healthy controls when reaching to proprioceptively-defined targets, and this between group difference was statistically significant. However, dopamine medication did not consistently degrade the reaching accuracy of PD patients, with both negative and positive effects on accuracy of reaching to proprioceptive-defined targets. Together, these findings indicate that dopamine replacement therapy not only did not normalize sensorimotor performance to the level of controls, but also induced deficits in the processing of proprioceptive information in some of the PD patients tested. Furthermore, the diversity of effects of medication on accuracy of reaching to proprioceptively-defined targets supports the idea that dysfunction of dopaminergic circuits within the basal ganglia is not primarily responsible for the proprioceptive processing deficits of PD patients. |
CC : | 002A25; 002B17G |
FD : | Dopamine; Proprioception; Coordination sensorimotrice; Noyau gris central; Maladie de Parkinson; Homme |
FG : | Maladie dégénérative; Pathologie du système nerveux; Pathologie de l'encéphale; Syndrome extrapyramidal; Pathologie du système nerveux central; Catécholamine; Neurotransmetteur; Encéphale; Système nerveux central |
ED : | Dopamine; Proprioception; Sensorimotor coordination; Basal ganglion; Parkinson disease; Human |
EG : | Degenerative disease; Nervous system diseases; Cerebral disorder; Extrapyramidal syndrome; Central nervous system disease; Catecholamine; Neurotransmitter; Encephalon; Central nervous system |
SD : | Dopamina; Propiocepción; Coordinación sensoriomotora; Núcleo basal; Parkinson enfermedad; Hombre |
LO : | INIST-17194.354000185405680070 |
ID : | 09-0119781 |
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<front><div type="abstract" xml:lang="en">Increasing evidence suggests that the pathophysiology of movement disorders in Parkinson's disease (PD) includes deficits in sensory processing and integration. However, the exact nature of these deficits and the ability of dopamine medication to correct them have not been thoroughly examined in previous studies. For instance, it remains unclear whether PD patients have globally impaired sensorimotor integration functions or selective deficiencies in processing proprioception. We evaluated the specific deficits of PD patients in sensorimotor integration and proprioceptive processing by testing their ability to perform three-dimensional (3D) reaching movements in four conditions in which the sensory signals defining target and hand positions (visual and/or proprioceptive) varied. Ten healthy subjects and 11 PD patients, ON dopamine medication and in the OFF state, were tested. PD patients in the OFF state showed a greater mean level of 3D errors relative to controls when the only available sensory information about target and hand position came from proprioception, but this difference did not reach significance. This indicates that deficient proprioception is not an early key feature of PD. Interestingly, the inaccuracies of a number of PD subjects further increased in the ON medicated state relative to healthy controls when reaching to proprioceptively-defined targets, and this between group difference was statistically significant. However, dopamine medication did not consistently degrade the reaching accuracy of PD patients, with both negative and positive effects on accuracy of reaching to proprioceptive-defined targets. Together, these findings indicate that dopamine replacement therapy not only did not normalize sensorimotor performance to the level of controls, but also induced deficits in the processing of proprioceptive information in some of the PD patients tested. Furthermore, the diversity of effects of medication on accuracy of reaching to proprioceptively-defined targets supports the idea that dysfunction of dopaminergic circuits within the basal ganglia is not primarily responsible for the proprioceptive processing deficits of PD patients.</div>
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<server><NO>PASCAL 09-0119781 INIST</NO>
<ET>IMPACT OF PARKINSON'S DISEASE AND DOPAMINERGIC MEDICATION ON PROPRIOCEPTIVE PROCESSING</ET>
<AU>MONGEON (D.); BLANCHET (P.); MESSIER (J.)</AU>
<AF>Département de Kinésiologie, Université de Montréal, 2100, boul. Édouard-Montpetit, bureau 8225/Montréal, Québec, QC H3T 1J4/Canada (1 aut., 3 aut.); Institut universitaire de gériatrie de Montréal, Université de Montréal, 4545, Chemin Queen-Mary/Montréal, Québec, H3W 1W4/Canada (1 aut., 3 aut.); Département de stomatologie, Université de Montréal, Pavillon Roger-Gaudry 2900, boul. Édouard-Montpetit/Montréal, Québec, H3T 1J4/Canada (2 aut.); Services de neurologie du Centre Hospitalier de l'Université de Montréal, Hôpital Notre-Dame, Pavillon DesChamps, 1560, rue Sherbrooke est/Montréal, Québec, H2L 4M1/Canada (2 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Neuroscience; ISSN 0306-4522; Coden NRSCDN; Royaume-Uni; Da. 2009; Vol. 158; No. 2; Pp. 426-440; Bibl. 1 p.3/4</SO>
<LA>Anglais</LA>
<EA>Increasing evidence suggests that the pathophysiology of movement disorders in Parkinson's disease (PD) includes deficits in sensory processing and integration. However, the exact nature of these deficits and the ability of dopamine medication to correct them have not been thoroughly examined in previous studies. For instance, it remains unclear whether PD patients have globally impaired sensorimotor integration functions or selective deficiencies in processing proprioception. We evaluated the specific deficits of PD patients in sensorimotor integration and proprioceptive processing by testing their ability to perform three-dimensional (3D) reaching movements in four conditions in which the sensory signals defining target and hand positions (visual and/or proprioceptive) varied. Ten healthy subjects and 11 PD patients, ON dopamine medication and in the OFF state, were tested. PD patients in the OFF state showed a greater mean level of 3D errors relative to controls when the only available sensory information about target and hand position came from proprioception, but this difference did not reach significance. This indicates that deficient proprioception is not an early key feature of PD. Interestingly, the inaccuracies of a number of PD subjects further increased in the ON medicated state relative to healthy controls when reaching to proprioceptively-defined targets, and this between group difference was statistically significant. However, dopamine medication did not consistently degrade the reaching accuracy of PD patients, with both negative and positive effects on accuracy of reaching to proprioceptive-defined targets. Together, these findings indicate that dopamine replacement therapy not only did not normalize sensorimotor performance to the level of controls, but also induced deficits in the processing of proprioceptive information in some of the PD patients tested. Furthermore, the diversity of effects of medication on accuracy of reaching to proprioceptively-defined targets supports the idea that dysfunction of dopaminergic circuits within the basal ganglia is not primarily responsible for the proprioceptive processing deficits of PD patients.</EA>
<CC>002A25; 002B17G</CC>
<FD>Dopamine; Proprioception; Coordination sensorimotrice; Noyau gris central; Maladie de Parkinson; Homme</FD>
<FG>Maladie dégénérative; Pathologie du système nerveux; Pathologie de l'encéphale; Syndrome extrapyramidal; Pathologie du système nerveux central; Catécholamine; Neurotransmetteur; Encéphale; Système nerveux central</FG>
<ED>Dopamine; Proprioception; Sensorimotor coordination; Basal ganglion; Parkinson disease; Human</ED>
<EG>Degenerative disease; Nervous system diseases; Cerebral disorder; Extrapyramidal syndrome; Central nervous system disease; Catecholamine; Neurotransmitter; Encephalon; Central nervous system</EG>
<SD>Dopamina; Propiocepción; Coordinación sensoriomotora; Núcleo basal; Parkinson enfermedad; Hombre</SD>
<LO>INIST-17194.354000185405680070</LO>
<ID>09-0119781</ID>
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