Abstract
Impulse control disorders (ICDs) are a group of non-motor symptoms of Parkinson disease (PD) leading to significant psychosocial detrimental outcome. The mesocorticolimbic network plays a distinctive role in reward learning and executive decision making and has been suggested to be involved in ICDs in PD. To study morphometric changes of the mesocorticolimbic network in PD with ICD. A total of 18 patients of PD with ICD (PD + ICD), 19 patients of PD without ICD (PD − ICD) and 19 healthy controls (HC) were included in the study. ICDs were diagnosed using Questionnaire for Impulsive-Compulsive Disorders in PD-Rating Scale (QUIP-RS). MRI was done using a 3T scanner and assessment of cortical thickness and subcortical volumes were done using FreeSurfer. Brain regions known to be part of the mesocorticolimbic network were extracted and included for statistical analysis. There was no difference between PD + ICD and PD − ICD with regard to duration of illness or total dopaminergic medication. In comparison to HC, patients with PD + ICD demonstrated atrophy of the left frontal pole, and this atrophy neared significance in comparison to PD − ICD. The QUIP-RS had a negative correlation with left caudate volume in PD + ICD. The PD + ICD group showed distinct morphometric changes in regions involved in the mesocorticolimbic system which may contribute to the presence of ICD.
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The study was funded by Parkinson Disease and movement disorder fund of National Institute of Mental Health and Neurosciences.
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MFA: research project: conception, organization, execution and statistical analysis: design, execution, manuscript preparation: writing of the first draft. SP: research project: conception, organization, execution and statistical analysis: design, execution, manuscript preparation: review and critique. SB: research project: organization, execution, statistical analysis, execution, review and critique. NK: research project, organization, execution and statistical analysis: design, execution, manuscript preparation: review and critique. RK: research project: execution, statistical analysis: review and critique and manuscript preparation: review and critique. VVH: research project: execution, statistical analysis: review and critique and manuscript preparation: review and critique. RM: research project: conception, statistical analysis: design, review and critique, manuscript preparation: review and critique. RY: research project: organization, execution, statistical analysis: review and critique, manuscript preparation: review and critique. JS: research project: conception, execution, statistical analysis: design, review and critique, manuscript preparation: review and critique. PKP: research project: conception, organization, statistical analysis: design, review and critique, manuscript preparation: review and critique.
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Ansari, M.F., Prasad, S., Bhardwaj, S. et al. Morphometric alterations of the mesocorticolimbic network in Parkinson’s disease with impulse control disorders. J Neural Transm 131, 229–237 (2024). https://doi.org/10.1007/s00702-023-02735-1
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DOI: https://doi.org/10.1007/s00702-023-02735-1