On-line motor control in patients with Parkinson's disease
Identifieur interne : 002E93 ( Main/Curation ); précédent : 002E92; suivant : 002E94On-line motor control in patients with Parkinson's disease
Auteurs : M. Desmurget ; V. Gaveau ; P. Vindras ; R. S. Turner [Suisse] ; E. Broussolle [États-Unis] ; S. Thobois [États-Unis]Source :
- Brain [ 0006-8950 ] ; 2004-08.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme, Simulation.
English descriptors
- KwdEn :
- Adult, Advanced stage, Aged, Basal Ganglia (physiopathology), Basal ganglion, Corrections, EOG = electro-oculography, Eye Movements, Feedback, Female, Gaze, Guidance, Human, Humans, Huntington Disease (physiopathology), Huntington disease, Huntington's disease, LED = light emitting diode, MD = movement duration, MRT = motor reaction time, Male, Middle Aged, Motor control, Movement (physiology), Nervous system diseases, Neuropsychological Tests, PL = path linearity, PV = peak velocity, Parkinson Disease (physiopathology), Parkinson disease, Parkinson's disease, Psychomotor Performance, RT = reaction time, Reaction Time, Response latency, Signal Processing, Computer-Assisted, Simulation, TC = time constant, UPDRS = Unified Parkinson's Disease Rating Score., Vision, Visual field, basal ganglia, on-line movement control.
- MESH :
- physiology : Movement.
- physiopathology : Basal Ganglia, Huntington Disease, Parkinson Disease.
- Adult, Aged, Eye Movements, Feedback, Female, Humans, Male, Middle Aged, Neuropsychological Tests, Psychomotor Performance, Reaction Time, Signal Processing, Computer-Assisted.
Abstract
Recent models based, in part on a study of Huntington's disease, suggest that the basal ganglia are involved in on-line movement guidance. Two experiments were conducted to investigate this idea. First, we studied advanced Parkinson's disease patients performing a reaching task known to depend on on-line guidance. The task was to ‘look and point’ in the dark at visual targets displayed in the peripheral visual field. In some trials, the target location was slightly modified during saccadic gaze displacement (when vision is suppressed). In both patient and control groups, the target jump induced a gradual modification of the movement which diverged smoothly from its original path to reach the new target location. No deficit was found in the patients, except for an increased latency to respond to the target jump (Parkinson's disease: 243 ms; controls: 166 ms). A computational simulation indicated that this response slowing was likely to be a by-product of bradykinesia. The unexpected inconsistency between this result and previous reports was investigated in a second experiment. We hypothesized that the relevant factor was the characteristics of the corrections to be performed. To test this prediction, we investigated a task requiring corrections of the same type as investigated in Huntington's disease, namely large, consciously detected errors induced by large target jumps at hand movement onset. In contrast with the smooth adjustments observed in the first experiment, the subjects responded to the target jump by generating a discrete corrective sub-movement. While this iterative response was relatively rapid in the control subjects (220 ms), Parkinson's disease patients exhibited either dramatically late (>730 ms) or totally absent on-line corrections. When on-line corrections were absent, the initial motor response was completed before a second corrective response was initiated (the latency of the corrective response was the same as the latency of the initial response). Considered together, these results suggest that basal ganglia dependent circuits are not critical for feedback loops involving a smooth modulation of the ongoing command. These circuits may rather contribute to the generation of discrete corrective sub-movements. This deficit is in line with the general impairment of sequential and simultaneous actions in patients with basal ganglia disorders.
Url:
DOI: 10.1093/brain/awh206
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<term>Humans</term>
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<term>Huntington's disease</term>
<term>LED = light emitting diode</term>
<term>MD = movement duration</term>
<term>MRT = motor reaction time</term>
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<term>Parkinson disease</term>
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<term>Reaction Time</term>
<term>Response latency</term>
<term>Signal Processing, Computer-Assisted</term>
<term>Simulation</term>
<term>TC = time constant</term>
<term>UPDRS = Unified Parkinson's Disease Rating Score.</term>
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<front><div type="abstract" xml:lang="en">Recent models based, in part on a study of Huntington's disease, suggest that the basal ganglia are involved in on-line movement guidance. Two experiments were conducted to investigate this idea. First, we studied advanced Parkinson's disease patients performing a reaching task known to depend on on-line guidance. The task was to ‘look and point’ in the dark at visual targets displayed in the peripheral visual field. In some trials, the target location was slightly modified during saccadic gaze displacement (when vision is suppressed). In both patient and control groups, the target jump induced a gradual modification of the movement which diverged smoothly from its original path to reach the new target location. No deficit was found in the patients, except for an increased latency to respond to the target jump (Parkinson's disease: 243 ms; controls: 166 ms). A computational simulation indicated that this response slowing was likely to be a by-product of bradykinesia. The unexpected inconsistency between this result and previous reports was investigated in a second experiment. We hypothesized that the relevant factor was the characteristics of the corrections to be performed. To test this prediction, we investigated a task requiring corrections of the same type as investigated in Huntington's disease, namely large, consciously detected errors induced by large target jumps at hand movement onset. In contrast with the smooth adjustments observed in the first experiment, the subjects responded to the target jump by generating a discrete corrective sub-movement. While this iterative response was relatively rapid in the control subjects (220 ms), Parkinson's disease patients exhibited either dramatically late (>730 ms) or totally absent on-line corrections. When on-line corrections were absent, the initial motor response was completed before a second corrective response was initiated (the latency of the corrective response was the same as the latency of the initial response). Considered together, these results suggest that basal ganglia dependent circuits are not critical for feedback loops involving a smooth modulation of the ongoing command. These circuits may rather contribute to the generation of discrete corrective sub-movements. This deficit is in line with the general impairment of sequential and simultaneous actions in patients with basal ganglia disorders.</div>
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<placeName><region type="state">Californie</region>
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<author><name sortKey="Thobois, S" sort="Thobois, S" uniqKey="Thobois S" first="S." last="Thobois">S. Thobois</name>
<affiliation wicri:level="2"><inist:fA14 i1="04"><s1>Department of Neurosurgery, University of California, San Francisco</s1>
<s2>San Francisco, California</s2>
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<sZ>6 aut.</sZ>
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<series><title level="j" type="main">Brain</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Advanced stage</term>
<term>Basal ganglion</term>
<term>Corrections</term>
<term>Feedback</term>
<term>Gaze</term>
<term>Guidance</term>
<term>Human</term>
<term>Huntington disease</term>
<term>Motor control</term>
<term>Nervous system diseases</term>
<term>Parkinson disease</term>
<term>Response latency</term>
<term>Simulation</term>
<term>Vision</term>
<term>Visual field</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Parkinson maladie</term>
<term>Contrôle moteur</term>
<term>Homme</term>
<term>Chorée Huntington</term>
<term>Noyau gris central</term>
<term>Guidage</term>
<term>Système nerveux pathologie</term>
<term>Stade avancé</term>
<term>Champ visuel</term>
<term>Regard</term>
<term>Vision</term>
<term>Simulation</term>
<term>Correction</term>
<term>Latence réponse</term>
<term>Boucle réaction</term>
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<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term>
<term>Simulation</term>
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<front><div type="abstract" xml:lang="en">Recent models based, in part on a study of Huntington's disease, suggest that the basal ganglia are involved in on-line movement guidance. Two experiments were conducted to investigate this idea. First, we studied advanced Parkinson's disease patients performing a reaching task known to depend on on-line guidance. The task was to 'look and point' in the dark at visual targets displayed in the peripheral visual field. In some trials, the target location was slightly modified during saccadic gaze displacement (when vision is suppressed). In both patient and control groups, the target jump induced a gradual modification of the movement which diverged smoothly from its original path to reach the new target location. No deficit was found in the patients, except for an increased latency to respond to the target jump (Parkinson's disease: 243 ms; controls: 166 ms). A computational simulation indicated that this response slowing was likely to be a by-product of bradykinesia. The unexpected inconsistency between this result and previous reports was investigated in a second experiment. We hypothesized that the relevant factor was the characteristics of the corrections to be performed. To test this prediction, we investigated a task requiring corrections of the same type as investigated in Huntington's disease, namely large, consciously detected errors induced by large target jumps at hand movement onset. In contrast with the smooth adjustments observed in the first experiment, the subjects responded to the target jump by generating a discrete corrective sub-movement. While this iterative response was relatively rapid in the control subjects (220 ms), Parkinson's disease patients exhibited either dramatically late (>730 ms) or totally absent on-line corrections. When on-line corrections were absent, the initial motor response was completed before a second corrective response was initiated (the latency of the corrective response was the same as the latency of the initial response). Considered together, these results suggest that basal ganglia dependent circuits are not critical for feedback loops involving a smooth modulation of the ongoing command. These circuits may rather contribute to the generation of discrete corrective sub-movements. This deficit is in line with the general impairment of sequential and simultaneous actions in patients with basal ganglia disorders.</div>
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<term>Aged</term>
<term>Basal Ganglia (physiopathology)</term>
<term>EOG = electro-oculography</term>
<term>Eye Movements</term>
<term>Feedback</term>
<term>Female</term>
<term>Humans</term>
<term>Huntington Disease (physiopathology)</term>
<term>Huntington's disease</term>
<term>LED = light emitting diode</term>
<term>MD = movement duration</term>
<term>MRT = motor reaction time</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Movement (physiology)</term>
<term>Neuropsychological Tests</term>
<term>PL = path linearity</term>
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<term>Parkinson's disease</term>
<term>Psychomotor Performance</term>
<term>RT = reaction time</term>
<term>Reaction Time</term>
<term>Signal Processing, Computer-Assisted</term>
<term>TC = time constant</term>
<term>UPDRS = Unified Parkinson's Disease Rating Score.</term>
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<term>Parkinson Disease</term>
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<term>Aged</term>
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<term>Feedback</term>
<term>Female</term>
<term>Humans</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Neuropsychological Tests</term>
<term>Psychomotor Performance</term>
<term>Reaction Time</term>
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<front><div type="abstract" xml:lang="en">Recent models based, in part on a study of Huntington's disease, suggest that the basal ganglia are involved in on-line movement guidance. Two experiments were conducted to investigate this idea. First, we studied advanced Parkinson's disease patients performing a reaching task known to depend on on-line guidance. The task was to ‘look and point’ in the dark at visual targets displayed in the peripheral visual field. In some trials, the target location was slightly modified during saccadic gaze displacement (when vision is suppressed). In both patient and control groups, the target jump induced a gradual modification of the movement which diverged smoothly from its original path to reach the new target location. No deficit was found in the patients, except for an increased latency to respond to the target jump (Parkinson's disease: 243 ms; controls: 166 ms). A computational simulation indicated that this response slowing was likely to be a by-product of bradykinesia. The unexpected inconsistency between this result and previous reports was investigated in a second experiment. We hypothesized that the relevant factor was the characteristics of the corrections to be performed. To test this prediction, we investigated a task requiring corrections of the same type as investigated in Huntington's disease, namely large, consciously detected errors induced by large target jumps at hand movement onset. In contrast with the smooth adjustments observed in the first experiment, the subjects responded to the target jump by generating a discrete corrective sub-movement. While this iterative response was relatively rapid in the control subjects (220 ms), Parkinson's disease patients exhibited either dramatically late (>730 ms) or totally absent on-line corrections. When on-line corrections were absent, the initial motor response was completed before a second corrective response was initiated (the latency of the corrective response was the same as the latency of the initial response). Considered together, these results suggest that basal ganglia dependent circuits are not critical for feedback loops involving a smooth modulation of the ongoing command. These circuits may rather contribute to the generation of discrete corrective sub-movements. This deficit is in line with the general impairment of sequential and simultaneous actions in patients with basal ganglia disorders.</div>
</front>
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