000909159 001__ 909159 000909159 005__ 20230515091755.0 000909159 0247_ $$2doi$$a10.1002/erv.2911 000909159 0247_ $$2ISSN$$a1067-1633 000909159 0247_ $$2ISSN$$a1072-4133 000909159 0247_ $$2ISSN$$a1099-0968 000909159 0247_ $$2Handle$$a2128/31689 000909159 0247_ $$2pmid$$a35701077 000909159 0247_ $$2WOS$$aWOS:000810701700001 000909159 037__ $$aFZJ-2022-03038 000909159 082__ $$a610 000909159 1001_ $$0P:(DE-HGF)0$$aRuan, Vanessa Ande$$b0$$eCorresponding author 000909159 245__ $$aNeural mechanisms underlying Social Recognition and Theory of Mind in Adolescent Patients with Bulimia Nervosa and Transdiagnostic Comparison with Anorexia Nervosa 000909159 260__ $$aChichester$$bWiley$$c2022 000909159 3367_ $$2DRIVER$$aarticle 000909159 3367_ $$2DataCite$$aOutput Types/Journal article 000909159 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1661232217_2169 000909159 3367_ $$2BibTeX$$aARTICLE 000909159 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000909159 3367_ $$00$$2EndNote$$aJournal Article 000909159 520__ $$aIntroductionTheory of mind (ToM) is important for social interactions and typical development and has been found to be impaired in patients with anorexia nervosa (AN) and bulimia nervosa (BN). Hypoactivation in frontotemporal brain regions seems to be the underlying neural mechanism in AN while whole-brain analyses in BN are lacking.MethodsWe used the well-validated social recognition task fMRI paradigm to assess ToM in a total of 72 female adolescents (16 BN, 18 AN and 38 matched healthy controls [HC]).ResultsCompared to HCBN, patients with BN showed hyperactivity during ToM-activity in the right frontal pole, middle temporal gyrus and left temporal pole and differed fundamentally from hypoactivation in these regions observed in patients with AN before and after short-term weight rehabilitation. Interaction and overlap analyses confirmed that similar regions were affected in opposite directions in both diseases. Hyperactivations in BN in the right middle temporal gyrus and right frontal pole were associated with clinical BN-severity markers binging and purging frequency.DiscussionThe hyperactivation in BN suggest different underlying neural mechanisms for ToM compared to AN. Hyperactivity might correspond to a different but also ineffective cognitive style in patients with BN when approaching social interactions. 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