Serveur d'exploration sur la maladie de Parkinson

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Effects of levodopa and subthalamic nucleus stimulation on cognitive and affective functioning in Parkinson's disease

Identifieur interne : 000143 ( France/Analysis ); précédent : 000142; suivant : 000144

Effects of levodopa and subthalamic nucleus stimulation on cognitive and affective functioning in Parkinson's disease

Auteurs : Aurélie Funkiewiez [France] ; Claire Ardouin [France] ; Roshan Cools [Royaume-Uni] ; Paul Krack [France] ; Valérie Fraix [France] ; Alina Batir [France] ; Stephan Chabardès [France] ; Alim-Louis Benabid [France] ; Trevor W. Robbins [Royaume-Uni] ; Pierre Pollak [France]

Source :

RBID : ISTEX:C251B29A0A62D5658BD6BE76B8576D968157E64B

English descriptors

Abstract

In Parkinson's disease (PD), levodopa and subthalamic nucleus (STN) stimulation lead to major improvement in motor symptoms. Effects of both treatments on cognition and affective status are less well understood. Motor, cognitive, and affective symptoms may relate to the dysfunctioning of parallel cortico–striatal loops. The aim of this study was to assess cognition, behavior, and mood, with and without both treatments in the same group of PD patients. A group of 22 nondemented PD patients was included in this study. Patients were tested twice before surgery (off and on levodopa) and twice 3 months after surgery (OFF and ON STN stimulation, off levodopa). Cognitive and affective effects of STN stimulation and levodopa had some common, but also different, effects. STN stimulation improved performance on the planning test, associated with the dorsolateral prefrontal cortex. However, the treatments had opposite effects on tests associated with the orbitofrontal cortex; specifically, levodopa impaired while STN stimulation improved performance on the extinction phase of a reversal/extinction task. Acutely, both treatments improved motivation and decreased fatigue and anxiety. On chronic treatment (3 months after surgery), depression improved, whereas apathy worsened 3 months after surgery. To conclude, there were significant but contrasting effects of levodopa and STN stimulation on cognition and affective functions. © 2006 Movement Disorder Society

Url:
DOI: 10.1002/mds.21029


Affiliations:


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ISTEX:C251B29A0A62D5658BD6BE76B8576D968157E64B

Le document en format XML

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<div type="abstract" xml:lang="en">In Parkinson's disease (PD), levodopa and subthalamic nucleus (STN) stimulation lead to major improvement in motor symptoms. Effects of both treatments on cognition and affective status are less well understood. Motor, cognitive, and affective symptoms may relate to the dysfunctioning of parallel cortico–striatal loops. The aim of this study was to assess cognition, behavior, and mood, with and without both treatments in the same group of PD patients. A group of 22 nondemented PD patients was included in this study. Patients were tested twice before surgery (off and on levodopa) and twice 3 months after surgery (OFF and ON STN stimulation, off levodopa). Cognitive and affective effects of STN stimulation and levodopa had some common, but also different, effects. STN stimulation improved performance on the planning test, associated with the dorsolateral prefrontal cortex. However, the treatments had opposite effects on tests associated with the orbitofrontal cortex; specifically, levodopa impaired while STN stimulation improved performance on the extinction phase of a reversal/extinction task. Acutely, both treatments improved motivation and decreased fatigue and anxiety. On chronic treatment (3 months after surgery), depression improved, whereas apathy worsened 3 months after surgery. To conclude, there were significant but contrasting effects of levodopa and STN stimulation on cognition and affective functions. © 2006 Movement Disorder Society</div>
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