Brain activation in individuals suffering from bulimia nervosa and control subjects during sweet and sour taste stimuli

Daphna Bardin Armon, Atira Bick, Sharon Florentin, Sofia Laufer, Gabriel Barkai, Eytan Bachar, Talma Hendler, Omer Bonne, Shikma Keller*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Introduction: Episodes of eating great quantities of extremely sweet and often aversive tasting food are a hallmark of bulimia nervosa. This unique eating pattern led researchers to seek and find differences in taste perception between patients and healthy control subjects. However, it is currently not known if these originate from central or peripheral impairment in the taste perception system. In this cross sectional study, we compare brain response to sweet and sour stimuli in 5 bulimic and 8 healthy women using functional magnetic resonance imaging (fMRI). Materials and methods: Sweet, sour and neutral (colorless and odorless) taste solutions were presented to subjects while undergoing fMRI scanning. Data were analyzed using a block design paradigm. Results: Between-group differences in brain activation in response to both sweet and sour tastes were found in 11 brain regions, including operculum, anterior cingulate cortex, midbrain, and cerebellum. These are all considered central to perception and processing of taste. Conclusion: Our data propose that sweet and sour tastes may have reward or aversion eliciting attributes in patients suffering from bulimia nervosa not found in healthy subjects, suggesting that alteration in taste processing may be a core dysfunction in bulimia nervosa (BN).

Original languageEnglish
Article number1022537
JournalFrontiers in Psychiatry
Volume14
DOIs
StatePublished - 2023
Externally publishedYes

Keywords

  • bulimia nervosa
  • eating disorders
  • neuroimaging
  • sour
  • sweet
  • taste

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