EEG, ERPs and food consumption

Author(s): Polich, J.

Journal/Book: Biol Psychol. 1998; 48: PO Box 211, 1000 AE Amsterdam, Netherlands. Elsevier Science BV. 139-151.

Abstract: 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.

Note: Article Polich J, Scripps Clin & Res Inst, Dept Neuropharmacol, 10550 N Torrey Pines Rd, La Jolla,CA 92037 USA

Keyword(s): food; electroencephalography; event-related brain potential; P300; spectral analysis; mean frequency; arousal; BLOOD-GLUCOSE; COGNITIVE PERFORMANCE; EVOKED-POTENTIALS; P300; MEMORY; HUMANS; HYPOGLYCEMIA; IMPAIRMENT; ATTENTION; SATIETY

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