Functional brain changes in early Parkinson's disease during motor response and motor inhibition

Francesca Baglio, Valeria Blasi, Andrea Falini, Elisabetta Farina, Federica Mantovani, Fabrizio Olivotto, Giuseppe Scotti, Raffaello Nemni, Marco Bozzali

Research output: Contribution to journalArticlepeer-review

Abstract

Motor impairment represents the main clinical feature of Parkinson's disease (PD). Cognitive deficits are also frequently observed in patients with PD, with a prominent involvement of executive functions and visuo-spatial abilities. We used event-related functional MRI (fMRI) and a paradigm based on visual attention and motor inhibition (Go/NoGO-task) to investigate brain activations in 13 patients with early PD in comparison with 11 healthy controls. The two groups did not report behavioural differences in task performance. During motor inhibition (NoGO-effect), PD patients compared to controls showed an increased activation in the prefrontal cortex and in the basal ganglia. They also showed a reduced and less coherent hemodynamic response in the occipital cortex. These results indicate that specific cortico-subcortical functional changes, involving not only the fronto-striatal network but also the temporal-occipital cortex, are already present in patients with early PD and no clinical evidence of cognitive impairment. We discuss our findings in terms of compensatory mechanisms (fronto-striatal changes) and preclinical signs of visuo-perceptual deficits and visual hallucinations.

Original languageEnglish
Pages (from-to)115-124
Number of pages10
JournalNeurobiology of Aging
Volume32
Issue number1
DOIs
Publication statusPublished - Jan 2011

Keywords

  • FMRI
  • Go/NoGo
  • Motor inhibition
  • Parkinson disease

ASJC Scopus subject areas

  • Ageing
  • Developmental Biology
  • Geriatrics and Gerontology
  • Clinical Neurology
  • Neuroscience(all)

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