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Functional Changes of Mentalizing Network in SCA2 Patients: Novel Insights into Understanding the Social Cerebellum

  • Giusy OlivitoEmail author
  • L. Siciliano
  • S. Clausi
  • M. Lupo
  • S. Romano
  • M. Masciullo
  • M. Molinari
  • M. Cercignani
  • M. Bozzali
  • M. Leggio
Original Paper

Abstract

In recent years, increasing evidence of the cerebellar role in social cognition has emerged. The cerebellum has been shown to modulate cortical activity of social brain regions serving as a regulator of function-specific mentalizing and mirroring processes. In particular, a mentalizing area in the posterior cerebellum, specifically Crus II, is preferentially recruited for more complex and abstract forms of social processing, together with mentalizing cerebral areas including the dorsal medial prefrontal cortex (dmPFC), the temporo-parietal junction (TPJ), and the precuneus. In the present study, the network-based statistics approach was used to assess functional connectivity (FC) differences within this mentalizing cerebello-cerebral network associated with a specific cerebellar damage. To this aim, patients affected by spinocerebellar ataxia type 2 (SCA2), a neurodegenerative disease specifically affecting regions of the cerebellar cortex, and age-matched healthy subjects have been enrolled. The dmPFC, left and right TPJ, the precuneus, and the cerebellar Crus II were used as regions of interest to construct the mentalizing network to be analyzed and evaluate pairwise functional relations between them. When compared with controls, SCA2 patients showed altered internodal connectivity between dmPFC, left (L-) and right (R-) TPJ, and right posterior cerebellar Crus II.

The present results indicate that FC changes affect a function-specific mentalizing network in patients affected by cerebellar damage. In particular, they allow to better clarify functional alteration mechanisms driven by the cerebellar damage associated with SCA2 suggesting that selective cortico-cerebellar functional disconnections may underlie patients’ social impairment in domain-specific complex and abstract forms of social functioning.

Keywords

Cerebellum Cerebral cortex Resting-state fMRI Social cognition Nodes 

Notes

Funding Information

This research was partially supported by the Italian Ministry of Health (Ricerca Corrente). This work was financially supported by the Ministry of Education, Universities and Research (MIUR) to Maria Leggio (Grant Number RM11715C7E67E525) and by the Italian Ministry of Health to Silvia Clausi (Grant Number GR-2013-02354888).

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2020

Authors and Affiliations

  • Giusy Olivito
    • 1
    • 2
    Email author
  • L. Siciliano
    • 3
  • S. Clausi
    • 1
    • 4
  • M. Lupo
    • 4
  • S. Romano
    • 5
  • M. Masciullo
    • 6
  • M. Molinari
    • 7
  • M. Cercignani
    • 8
  • M. Bozzali
    • 8
    • 9
  • M. Leggio
    • 1
    • 4
  1. 1.Department of PsychologySapienza University of RomeRomeItaly
  2. 2.IRCCS Santa Lucia FoundationRomeItaly
  3. 3.PhD Program in Behavioral NeuroscienceSapienza University of RomeRomeItaly
  4. 4.Ataxia LaboratoryIRCCS Santa Lucia FoundationRomeItaly
  5. 5.Department of Neurosciences, Mental Health and Sensory Organs (NESMOS)“Sapienza” University of Rome-Sant’Andrea HospitalRomeItaly
  6. 6.SPInal REhabilitation LabIRCCS Fondazione Santa LuciaRomeItaly
  7. 7.Robotic Neurorehabilitation Lab, Neurorehabilitation 1 and Spinal CenterIRCCS Fondazione Santa LuciaRomeItaly
  8. 8.Clinical Imaging Science CenterBrighton and Sussex Medical SchoolBrightonUK
  9. 9.Neuroimaging LaboratoryIRCCS Santa Lucia FoundationRomeItaly

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