Parkinson’s Disease (PD) patients who take dopaminergic therapy are at risk for developing impulsive-compulsive behaviors, and these behaviors localize to the mesocorticolimbic regions. Using a caregiver-reported values from the Frontal Systems Behavioral Scale (FrSBe), we assessed disinhibition, apathy, and dysexecutive symptoms in 72 PD patients. All participants completed brain MRI, and we measured cortical thickness in frontal regions, assessing the relationship between cortical thickness and FrSBE scores. We find that thickness in the insula is directly related to disinhibited behaviors. These results provide new insights into how cortical changes and behavioral symptoms are linked in PD.
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