Attentional cortical responses to enlarged faces are related to body fat in normal weight subjects: an electroencephalographic study
| Autor: | Nicola Marzano, Claudia Di Santo, Carla Rendina, Fabrizio Vecchio, Claudio Babiloni, Claudio Del Percio, Fabrizio Eusebi, Anna Valenzano, Giuseppe Cibelli, Luisa Ciociola, Brunello Lecce, Ciro Mundi, Mario De Rosas |
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| Rok vydání: | 2008 |
| Předmět: |
Adult
Male medicine.medical_specialty Future studies Emotions Prefrontal Cortex p300 Electroencephalography Audiology Neuropsychological Tests low-resolution electromagnetic brain tomography (loreta) Body fat percentage Body Mass Index Young Adult Reference Values Physiology (medical) medicine Reaction Time Humans In patient Attention Obesity Evoked Potentials Cerebral Cortex Brain Mapping medicine.diagnostic_test electroencephalography (eeg) body fat Sensory Systems Electrophysiology Neurology Normal weight Face Visual Perception Female Neurology (clinical) Psychology Neuroscience Bioelectrical impedance analysis Neurocognitive Photic Stimulation |
| Zdroj: | Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology. 120(5) |
| ISSN: | 1872-8952 |
| Popis: | Objective Here we tested the hypothesis that in normal weight subjects, attentional cortical responses to the enlargement of faces are related to features of body weight, as a basis for future studies on the role of neurocognitive mechanisms in eating and weight disorders. Methods Electroencephalographic data were recorded in 15 normal weight adults during a visual "oddball" paradigm. The subjects were given frequent (70%) and rare (30%) stimuli depicting faces (FACE), food (FOOD), and landscapes (CONTROL). The task was to click the mouse after the rare stimuli. These stimuli depicted the same frequent stimuli graphically dilated by 25% along the horizontal axis. Analysis of bioelectrical impedance indexed subjects' body fat percentage. Cortical attentional responses were probed by the difference between positive event-related potentials peaking around 200–600ms post-stimulus for the frequent minus rare stimuli (P300). LORETA estimated P300 cortical sources. Results Main results showed that in the FACE condition, there was a negative correlation between the body fat percentage and the reaction time to the rare stimuli, and a positive correlation between the body fat percentage and the amplitude of prefrontal P300 sources ( p Conclusions These results disclose a relationship between body fat and prefrontal attentional processes to body image in normal weight adults. Significance The present study motivates future research testing the hypothesis that this relationship might be altered in patients with eating and weight disorders. |
| Databáze: | OpenAIRE |
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