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Electrophysiological indices of visual food cue-reactivity. Differences in obese, overweight and normal weight women.
Hume, David John; Howells, Fleur Margaret; Rauch, H G Laurie; Kroff, Jacolene; Lambert, Estelle Victoria.
Afiliación
  • Hume DJ; MRC/UCT Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Newlands, Cape Town 7725, South Africa. Electronic address: davidjohnhume@gmail.com.
  • Howells FM; Department of Psychiatry and Mental Health, Faculty of Health Sciences, University of Cape Town, Observatory, 7925, South Africa.
  • Rauch HG; MRC/UCT Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Newlands, Cape Town 7725, South Africa.
  • Kroff J; MRC/UCT Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Newlands, Cape Town 7725, South Africa.
  • Lambert EV; MRC/UCT Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Newlands, Cape Town 7725, South Africa.
Appetite ; 85: 126-37, 2015 Feb.
Article en En | MEDLINE | ID: mdl-25464021
Heightened food cue-reactivity in overweight and obese individuals has been related to aberrant functioning of neural circuitry implicated in motivational behaviours and reward-seeking. Here we explore the neurophysiology of visual food cue-reactivity in overweight and obese women, as compared with normal weight women, by assessing differences in cortical arousal and attentional processing elicited by food and neutral image inserts in a Stroop task with record of EEG spectral band power and ERP responses. Results show excess right frontal (F8) and left central (C3) relative beta band activity in overweight women during food task performance (indicative of pronounced early visual cue-reactivity) and blunted prefrontal (Fp1 and Fp2) theta band activity in obese women during office task performance (suggestive of executive dysfunction). Moreover, as compared to normal weight women, food images elicited greater right parietal (P4) ERP P200 amplitude in overweight women (denoting pronounced early attentional processing) and shorter right parietal (P4) ERP P300 latency in obese women (signifying enhanced and efficient maintained attentional processing). Differential measures of cortical arousal and attentional processing showed significant correlations with self-reported eating behaviour and body shape dissatisfaction, as well as with objectively assessed percent fat mass. The findings of the present study suggest that heightened food cue-reactivity can be neurophysiologically measured, that different neural circuits are implicated in the pathogenesis of overweight and obesity, and that EEG techniques may serve useful in the identification of endophenotypic markers associated with an increased risk of externally mediated food consumption.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Señales (Psicología) / Sobrepeso / Potenciales Evocados / Conducta Alimentaria / Obesidad Tipo de estudio: Prognostic_studies Límite: Adult / Female / Humans Idioma: En Revista: Appetite Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Señales (Psicología) / Sobrepeso / Potenciales Evocados / Conducta Alimentaria / Obesidad Tipo de estudio: Prognostic_studies Límite: Adult / Female / Humans Idioma: En Revista: Appetite Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido