EEG, ERPs and food consumption.
Baseline electroencephalographic (EEG) and auditory event-related brain potentials (ERPs) were assessed in subjects before and after consuming food and under eyes open and closed recording conditions in an attempt to replicate and extend previous food--ERP effects. Subjects were assessed the morning after fasting from the previous night, before and after eating a standard lunch. Delta- band EEG spectral power decreased and theta- and early alpha-band frequency increased after food consumption. However, in contrast to previous reports, P300 amplitude was unaffected by food consumption and peak latency increased. The strength of the correlational association between background EEG activity and P300 measures decreased for the delta- and theta- bands, but increased for the early and late alpha- bands. The findings suggest that food consumption affects general arousal, rather than specific cognitive EEG or ERP factors and are discussed with respect to previous EEG-ERP findings on food intake.
Department of Neuropharmacology, The Scripps Research Institute, La Jolla, CA 92037, USA.
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Hoffman
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Polich
D000328:Adult; D000704:Analysis of Variance; D001288:Attention / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology*; D004435:Eating / Q000502:physiology*; D004569:Electroencephalography; D002149:Energy Intake / Q000502:physiology; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005143:Eyelids; D005215:Fasting / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D010897:Pitch Discrimination / Q000502:physiology; D014785:Vision, Ocular / Q000502:physiology