Cortico-striatal-thalamic network functional connectivity in hemiparkinsonism

Federica Agosta, Francesca Caso, Iva Stankovic, Alberto Inuggi, Igor Petrovic, Marina Svetel, Vladimir S. Kostic, Massimo Filippi

Research output: Contribution to journalArticlepeer-review

Abstract

Cortico-striatal-thalamic network functional connectivity (FC) and its relationship with levodopa (L-dopa) were investigated in 69 patients with hemiparkinsonism (25 drug-naïve [n-PD] and 44 under stable/optimized dopaminergic treatment [t-PD]) and 27 controls. Relative to controls, n-PD patients showed an increased FC between the left and the right basal ganglia, and a decreased connectivity of the affected caudate nucleus and thalamus with the ipsilateral frontal and insular cortices. Compared with both controls and n-PD patients, t-PD patients showed a decreased FC among the striatal and thalamic regions, and an increased FC between the striatum and temporal cortex, and between the thalamus and several sensorimotor, parietal, temporal, and occipital regions. In both n-PD and t-PD, patients with more severe motor disability had an increased striatal and/or thalamic FC with temporal, parietal, occipital, and cerebellar regions. Cortico-striatal-thalamic functional abnormalities occur in patients with hemiparkinsonism, antecede the onset of the motor symptoms on the opposite body side and are modulated by L-dopa. In patients with hemiparkinsonism, L-dopa is likely to facilitate a compensation of functional abnormalities possibly through an increased thalamic FC.

Original languageEnglish
Pages (from-to)2592-2602
Number of pages11
JournalNeurobiology of Aging
Volume35
Issue number11
DOIs
Publication statusPublished - Nov 1 2014

Keywords

  • Cortico-striatal-thalamic network
  • Hemiparkinsonism
  • Parkinson's disease (PD)
  • Resting state functional MRI (RS fMRI)

ASJC Scopus subject areas

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

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