Multimodal investigations of structural and functional brain alterations in anorexia and bulimia nervosa and their relationships to psychopathology

  • IMAGEN, STRATIFY and ESTRA Consortia
  • , Xinyang Yu
  • , Lauren Robinson
  • , Marina Bobou
  • , Zuo Zhang
  • , Tobias Banaschewski
  • , Gareth J. Barker
  • , Arun L.W. Bokde
  • , Herta Flor
  • , Antoine Grigis
  • , Hugh Garavan
  • , Penny Gowland
  • , Andreas Heinz
  • , Rüdiger Brühl
  • , Jean-Luc Martinot
  • , Marie-Laure Paillère Martinot
  • , Eric Artiges
  • , Frauke Nees
  • , Dimitri Papadopoulos Orfanos
  • , Hervé Lemaître
  • Luise Poustka, Sarah Hohmann, Nathalie Holz, Christian Bäuchl, Michael N. Smolka, Argyris Stringaris, Henrik Walter, Robert Whelan, Julia Sinclair, Gunter Schumann, Ulrike Schmidt, Sylvane Desrivières*
*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

BACKGROUND: Neurobiological understanding of eating disorders (EDs) is limited. This study presents the first comparative multi-modal magnetic resonance imaging (MRI) assessments of anorexia nervosa (AN) and bulimia nervosa (BN), uncovering neurobiological differences associated with these disorders.

METHODS: This female case-control study included 57 healthy controls (HC) and 130 participants with EDs (BN and AN subtypes). Structural and functional MRI assessed gray matter volume (GMV), cortical thickness (CT), and task-based activities related to reward processing, social-emotional functioning, and response inhibition. Whole-brain group differences were correlated to ED psychopathology.

RESULTS: Significant structural differences were observed in the ED group compared to HCs, including reduced GMV in the left lateral orbitofrontal cortex and lower CT in the left rostral middle frontal gyrus and precuneus, after adjusting for BMI. Specific structural alterations were only evident in AN subgroups. GMV reductions in the orbitofrontal cortex were linked to impulsivity, while lower CT in the frontal gyrus correlated with cognitive restraint in eating, suggesting these regions may play key roles in ED psychopathology. Functional MRI also revealed notable differences. During reward anticipation, participants with EDs exhibited deactivations in the cerebellum and right superior frontal gyrus, alongside reduced activation in the left lingual gyrus. These functional changes were associated with heightened neuroticism. Mediation analyses suggested that starvation-related GMV reductions in EDs disrupt reward-related brain function, increase neuroticism, and reinforce cognitive restraint, likely contributing to the persistence of ED symptoms.

CONCLUSIONS: These findings illuminate key neurobehavioral mechanisms underlying EDs, pointing to potential brain-based targets for developing specialized treatment.

Original languageEnglish
JournalBiological Psychiatry
Early online date23 Nov 2024
DOIs
Publication statusE-pub ahead of print - 23 Nov 2024
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Keywords

  • Eating disorder
  • anorexia nervosa
  • bulimia nervosa
  • magnetic resonance imaging
  • cognitive restraint
  • reward processing

ASJC Scopus subject areas

  • Biological Psychiatry
  • Psychiatry and Mental health

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