Amygdalar modulation of frontotemporal connectivity during the inkblot test

Tomoki Asari, Seiki Konishi, Koji Jimura, Junichi Chikazoe, Noriko Nakamura, Yasushi Miyashita

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Unique and unusual responses to inkblot stimuli evoked by emotionally vulnerable psychiatric patients have been considered as examples of interference of emotion with perceptual processes. However, few studies have investigated the interaction between emotion-related and perception-related neural circuits during performance of the inkblot test. In our recent studies using the inkblot stimuli, enlargement of the amygdala was revealed in association with frequent production of unique responses to the inkblot stimuli. Additionally, our studies demonstrated right temporopolar activation associated with the production of unique responses, as well as left anterior prefrontal and bilateral occipitotemporal activation associated with the production of typical responses. On the basis of these results, we hypothesized that the amygdala is involved in modulation of the connectivity among the frontotemporal regions identified in the activation analysis. To address this issue, we performed a functional connectivity analysis of functional magnetic resonance imaging data, using physiophysiological interaction implemented in Statistical Parametric Mapping 2 (SPM2). This analysis revealed that the amygdala imposed a positive modulation on the connection from the anterior prefrontal region to the temporopolar region, and a negative modulation on the connection from the temporopolar region to the occipitotemporal regions. These results suggest that interference of emotion affects perception during the inkblot test.

Original languageEnglish
Pages (from-to)103-110
Number of pages8
JournalPsychiatry Research - Neuroimaging
Volume182
Issue number2
DOIs
Publication statusPublished - 2010 May 1
Externally publishedYes

Keywords

  • Anterior prefrontal cortex
  • Effective connectivity
  • Functional magnetic resonance imaging (fMRI)
  • Physiophysiological interaction
  • Rorschach
  • Temporal pole

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Radiology Nuclear Medicine and imaging
  • Psychiatry and Mental health

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