La maladie de Parkinson en France (serveur d'exploration)

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Distinct effects of dopamine vs STN stimulation therapies in associative learning and retention in Parkinson disease.

Identifieur interne : 000162 ( PubMed/Corpus ); précédent : 000161; suivant : 000163

Distinct effects of dopamine vs STN stimulation therapies in associative learning and retention in Parkinson disease.

Auteurs : Jocelyne Ventre-Dominey ; Hélène Mollion ; Stephane Thobois ; Emmanuel Broussolle

Source :

RBID : pubmed:26778783

English descriptors

Abstract

Evidence has been provided in Parkinson's disease patients of cognitive impairments including visual memory and learning which can be partially compensated by dopamine medication or subthalamic nucleus stimulation. The effects of these two therapies can differ according to the learning processes involving the dorsal vs ventral part of the striatum. Here we aimed to investigate and compare the outcomes of dopamine vs stimulation treatment in Parkinson patient's ability to acquire and maintain over successive days their performance in visual working memory. Parkinson patients performed conditional associative learning embedded in visual (spatial and non spatial) working memory tasks over two consecutive days either ON or OFF dopaminergic drugs or STN stimulation depending on the group of patients studied. While Parkinson patients were more accurate and faster in memory tasks ON vs OFF stimulation independent of the day of testing, performance in medicated patients differed depending on the medication status during the initial task acquisition. Patients who learnt the task ON medication the first day were able to maintain or even improve their memory performance both OFF and ON medication on the second day after consolidation. These effects were observed only in patients with dopamine replacement with or without motor fluctuations. This enhancement in memory performance after having learnt under dopamine medication and not under STN stimulation was mostly significant in visuo-spatial working memory tasks suggesting that dopamine replacement in the depleted dorsal striatum is essential for retention and consolidation of learnt skill.

DOI: 10.1016/j.bbr.2016.01.010
PubMed: 26778783

Links to Exploration step

pubmed:26778783

Le document en format XML

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