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Cerebellum and personality traits.

Laura Petrosini1, Debora Cutuli, Eleonora Picerni

  • 1I.R.C.C.S. Santa Lucia Foundation, via Ardeatina 306, 00179, Rome, Italy, laura.petrosini@uniroma1.it.

Cerebellum (London, England)
|December 16, 2014
PubMed
Summary

The cerebellum, particularly Crus 1, is linked to personality traits like Novelty Seeking and alexithymia. This finding expands our understanding of the cerebellum's role beyond motor control.

Area of Science:

  • Neuroscience
  • Psychology
  • Behavioral Science

Background:

  • Personality traits involve cognitive, emotional, and behavioral characteristics mediated by various brain structures.
  • Previous research suggests a role for the cerebellum in emotional processing and personality characteristics.

Purpose of the Study:

  • To investigate the correlation between cerebellar structure and personality traits using the Temperament and Character Inventory (TCI).
  • To explore the cerebellum's involvement in alexithymia, a personality construct characterized by impaired emotional processing.

Main Methods:

  • Correlated macro- and micro-structural variations of the cerebellum with TCI scores in a large, diverse sample of healthy adults.
  • Examined cerebellar volumes in subjects with high alexithymic traits.

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Main Results:

  • Cerebellar volumes positively correlated with Novelty Seeking scores and negatively with Harm Avoidance scores.
  • Individuals with high alexithymic traits exhibited larger volumes in the bilateral Crus 1 region of the cerebellum.
  • Enlarged Crus 1 volumes in novelty seekers and alexithymics suggest a link to a tendency for action.

Conclusions:

  • The cerebellum's structural variations are associated with specific personality dimensions, extending its known functions.
  • Cerebellar involvement in personality traits like Novelty Seeking and alexithymia highlights its role in emotional and affective processing.
  • Findings suggest the cerebellum's contribution to action-oriented behaviors inherent in certain personality constructs.