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Executive functioning and risk-taking behavior in Parkinson’s disease patients with impulse control disorders

  • Neurology and Preclinical Neurological Studies - Original Article
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Abstract

Impulse control disorders (ICD) are common in Parkinson’s disease (PD) and are associated with dopaminergic medication. The purpose of this study was to investigate executive function and risk-taking behavior in PD patients with ICD. 17 PD patients with ICD (ICD-PD) were compared to 20 PD patients without ICD (CTRL-PD) using neuropsychological and experimental tasks. Executive functions were assessed using standard executive testing (Conner’s Performance Test, Modified Wisconsin Card Sorting Test, Trail Making Test and phonological verbal fluency). Subjects were also submitted to an experimental gambling task consisted of three decks of money cards: neutral deck (equal opportunity for gains as losses), winning deck (small amount of money with a positive balance) and loser deck (high amount of money with a negative balance), evaluating risk-taking behavior (number of cards picked in each deck) and valuation of the reward (subjective appreciation of the value of each deck). There was no significant difference in executive functioning between groups. Both groups selected more cards in the losing deck (high amount of money) as compared to the neutral deck (Mann–Whitney test, ICD-PD, p = 0.02; CTRL-PD, p = 0.003) and to the winning deck (Mann–Whitney test, ICD-PD p = 0.0001; CTRL-PD p = 0.003), suggesting an increased risk-taking behavior. Interestingly, we found that ICD-PD patients estimated the value of decks differently from CTRL-PD patients, taking into account mainly the positive reinforced value of the decks (Mann–Whitney test, p = 0.04). This study showed that executive pattern and risk-taking behavior are similar between ICD-PD and CTRL-PD patients. However, ICD-PD patients showed a specific deficit of the subjective estimation of the reward. Links between this deficit and metacognitive skills are discussed.

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Acknowledgments

The authors thank the patients who participated to the study.

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Correspondence to Fanny Pineau.

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Financial disclosures/conflict of interest

FP has received grants from Novartis Pharma. EFR has received Grants from “poste d’accueil” APHP/CNRS, Grants from INSERM (COSSEC), Grants from APHP (DRC-PHRC), Grants from Fondation pour la Recherche sur le Cerveau (FRC), Grants, personal fees and non-financial support from Merz-pharma, Grants and personal fees from Orkyn, Grants from IP Santé, Grants and personal fees from Ultragenyx, personal fees from Novartis, personal fees and non-financial support from Ipsen Pharma, non financial supports from Teva, non-financial support from Abbvie, non-financial support from Dystonia Europe, non-financial support from the Georgian Medical and Public Health Association, non financial support from the International Federation of Clinical neurophysiology, non-financial support from the Movement Disorders Society. LL has received personal fees from Novartis Pharma, personal fees from GE, non-financial supports from Merck-Serono, Grants from Sanofi-Aventis, Grants from GSK, Grants from Cytokinetic. MV has received personal fees from Mertz, non-financial support from Movement Disorders Society, non-financial support from EAN. JCC has received personal fees and non-financial support from abbvie, personal fees from Amarentus, personal fees from Zambon, personal fees from Pfizer, personal fees from Clevexel, non-financial support from UCB, Grants from Sanofi-Aventis, Grants from Ipsen, Grants from the Michael J. Fox foundation, and own stock in B&A Therapeutics.

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None.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Pineau, F., Roze, E., Lacomblez, L. et al. Executive functioning and risk-taking behavior in Parkinson’s disease patients with impulse control disorders. J Neural Transm 123, 573–581 (2016). https://doi.org/10.1007/s00702-016-1549-y

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  • DOI: https://doi.org/10.1007/s00702-016-1549-y

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