Increased activation of the supragenual anterior cingulate cortex during visual emotional processing in male subjects with high degrees of alexithymia: An event-related fMRI study

Alexander Heinzel, Ralf Schäfer, Hans Wilhelm Müller, Andre Schieffer, Ariane Ingenhag, Simon B. Eickhoff, Georg Northoff, Matthias Franz, Hubertus Hautzel

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Background: One of the most prominent neurobiological models of alexithymia assumes an altered function of the anterior cingulate cortex (ACC) as the crucial neural correlate of alexithymia. So far functional imaging studies have yielded inconclusive results. Therefore, we tested this hypothesis in healthy alexithymics and nonalexithymics in an event-related fMRI study. Methods:Thirty high-and 30 low-alexithymic right-handed male subjects (selected by the 20-item Toronto Alexithymia Scale, TAS-20) were investigated with event-related fMRI using a picture viewing paradigm. The stimuli consisted of happy, fearful and neutral facial expressions (Ekman-Friesen) as well as positive, negative and neutral pictures from the International Affective Picture System. Results: Contrasting the high-alexithymic with the low-alexithymic group we observed increased activation of the supragenual ACC for different emotional valences as well as for different emotional stimuli. Moreover, there was a positive correlation of the ACC with the individual TAS-20 scores but no correlations with the individual Beck Depression Inventory scores. Additionally, there was no difference in activity of the amygdala. Conclusions: We demonstrated that the supragenual ACC is constantly activated more strongly in alexithymic subjects and that this activation is related to the symptoms of alexithymia and not to associated symptoms such as depression. Therefore, our findings support the hypothesis of an altered function of the ACC in alexithymia.

Original languageEnglish
Pages (from-to)363-370
Number of pages8
JournalPsychotherapy and Psychosomatics
Volume79
Issue number6
DOIs
Publication statusPublished - Oct 2010
Externally publishedYes

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Keywords

  • Alexithymia
  • Emotion
  • fMRI
  • Supragenual anterior cingulate cortex
  • TAS-20

ASJC Scopus subject areas

  • Clinical Psychology
  • Applied Psychology
  • Psychiatry and Mental health

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