1. Impulse control disorder in PD: A lateralized monoaminergic frontostriatal disconnection syndrome?
- Author
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Premi, E., Pilotto, A., Garibotto, V., Bigni, B., Turrone, R., Alberici, A., Cottini, E., Poli, L., Bianchi, M., Formenti, A., Cosseddu, M., Gazzina, S., Magoni, M., Bertoli, M., Paghera, B., Borroni, B., and Padovani, A.
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IMPULSE control disorders , *PARKINSON'S disease patients , *MAGNETIC resonance imaging of the brain , *ANALYSIS of covariance , *NEURAL circuitry , *DIAGNOSIS , *BASAL ganglia , *BRAIN mapping , *DIGITAL image processing , *MAGNETIC resonance imaging , *PARKINSON'S disease , *NEURAL pathways , *DISEASE complications - Abstract
Background: Impulse Control Disorder symptoms (ICD) in Parkinson's disease (PD) has been recently associated by magnetic Resonance imaging with impaired cortico-striatal connectivity, especially between left putamen and frontal associative areas.Methods: 84 patients entered the study (21 PD-ICD+ and 64 PD-ICD-) and underwent DATSCAN imaging. The striatal tracer uptake was evaluated using BRASS software (Hermes, Sweden). The whole-brain analysis was performed with Statistical Parametric Mapping (SPM).Results: PD-ICD+ showed a significant reduction of left putaminal and left inferior frontal gyrus tracer uptake compared to PD-ICD-. Functional covariance analysis using left putamen as the seed point showed that, in contrast to ICD-patients, ICD+ patients had no functional covariance with contralateral basal ganglia and ipsilateral cingulate cortex, as index of an impaired inter- and intra-hemispheric dopamine binding in PD-ICD+.Discussion: the results support and expand the concept of a functional disconnection syndrome linked to ICD symptoms in PD patients through an asymmetric molecular frontostriatal network breakdown with left basal ganglia as central hub. [ABSTRACT FROM AUTHOR]- Published
- 2016
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