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024 7 _ |a 10.1016/j.nicl.2023.103315
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100 1 _ |a Baagil, Hamzah
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245 _ _ |a Neural correlates of impulse control behaviors in Parkinson’s disease: Analysis of multimodal imaging data
260 _ _ |a [Amsterdam u.a.]
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520 _ _ |a Background: Impulse control behaviors (ICB) are frequently observed in patients with Parkinson's disease (PD) and are characterized by compulsive and repetitive behavior resulting from the inability to resist internal drives.Objectives: In this study, we aimed to provide a better understanding of structural and functional brain alterations and clinical parameters related to ICB in PD patients.Methods: We utilized a dataset from the Parkinson's Progression Markers Initiative including 36 patients with ICB (PDICB+) compared to 76 without ICB (PDICB-) and 61 healthy controls (HC). Using multimodal MRI data we assessed gray matter brain volume, white matter integrity, and graph topological properties at rest.Results: Compared with HC, PDICB+ showed reduced gray matter volume in the bilateral superior and middle temporal gyrus and in the right middle occipital gyrus. Compared with PDICB-, PDICB+ showed volume reduction in the left anterior insula. Depression and anxiety were more prevalent in PDICB+ than in PDICB- and HC. In PDICB+, lower gray matter volume in the precentral gyrus and medial frontal cortex, and higher axial diffusivity in the superior corona radiata were related to higher depression score. Both PD groups showed disrupted functional topological network pattern within the cingulate cortex compared with HC. PDICB+ vs PDICB- displayed reduced topological network pattern in the anterior cingulate cortex, insula, and nucleus accumbens.Conclusions: Our results suggest that structural alterations in the insula and abnormal topological connectivity pattern in the salience network and the nucleus accumbens may lead to impaired decision making and hypersensitivity towards reward in PDICB+. Moreover, PDICB+ are more prone to suffer from depression and anxiety.Keywords: Functional MRI; Impulse control behaviors; Parkinson’s disease; Structural magnetic resonance imaging (MRI).
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700 1 _ |a Hohenfeld, Christian
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700 1 _ |a Habel, Ute
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700 1 _ |a Eickhoff, Simon B.
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700 1 _ |a Gur, Raquel E.
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700 1 _ |a Reetz, Kathrin
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700 1 _ |a Dogan, Imis
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