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

Behavioural Brain Research
J Ventre-DomineyEmmanuel Broussolle

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. The...Continue Reading

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Citations

Dec 18, 2019·Dementia & Neuropsychologia·Eduarda Naidel Barboza E Barbosa, Helenice Charchat Fichman
Jul 10, 2019·Dementia & Neuropsychologia·Eduarda Naidel Barboza E Barbosa, Helenice Charchat-Fichman

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