Abstract
The psychophysiological effects of gumchewing were studied by event-related potential (ERP) in 12 healthy volunteers (six males and six females) aged 20–57 years. ERP was recorded with the Tentwenty electrode system from the contingent negative variation (CNV) paradigm after gumchewing and resting, and 5 event-related potential components (N100, P300, Early CNV, Middle CNV, Rate CNV) were extracted for principle component analysis. N100 peak amplitude after gumchewing was significantly larger than that after resting at F3, FZ, F7, and F8, (p<0.05). Early CNV amplitude after gumchewing was significantly larger than that after resting at FZ, F7, C4, P3, T6 and O2 (p<0.05). Reaction time after gumchewing was significantly shorter than that after resting. These results suggested that gumchewing raises general attention and the arousal level with precision.
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