Transcranial direct current stimulation modulates implicit attitudes towards food in eating disorders

The International Journal of Eating Disorders
Giulia MattavelliCostanza Papagno

Abstract

Neuromodulation of regions involved in food processing is increasingly used in studies on eating behaviors, but results are controversial. We assessed the effects of anodal transcranial direct current stimulation (a-tDCS) on food and body implicit preferences in patients with eating disorders (EDs). Thirty-six ED patients and 36 healthy females completed three sessions with a-tDCS applied to the medial-prefrontal cortex (mPFC), the right extrastriate body area (rEBA) or in sham mode. Each participant then completed three Implicit Association Tests (IATs) on tasty/tasteless food, underweight/overweight body images, flowers versus insects as control. Differences in latency between incongruent and congruent blocks were calculated (D score). The tDCS by group interaction was significant for the IAT-food D score, with patients showing weaker preference for tasty food than controls in sham, but not a-tDCS sessions. In particular, rEBA stimulation significantly increased patients' D score compared to sham. Moreover, a-tDCS over mPFC and rEBA selectively increased patients' reaction times in the incongruent blocks of the IAT-food. A-tDCS on frontal and occipito-temporal cortices modulated food preferences in ED patients. The effect was...Continue Reading

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Citations

Aug 10, 2020·Eating and Weight Disorders : EWD·Georgios PaslakisSimone Kühn
Nov 22, 2020·Social Cognitive and Affective Neuroscience·Alessia GallucciGiulia Mattavelli
Nov 18, 2021·Obesity Reviews : an Official Journal of the International Association for the Study of Obesity·Jordan D BeaumontMartin J Barwood

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