Fig. 5

Electroencephalogram frequency activities under the condition of chocolate taste stimulation and comparison of mean areal occupancy rates of the theta, alpha and beta frequency bands under conditions of no odor stimulation and odor stimulation, respectively, while tasting chocolate. a Mean occupancy rates for the theta, alpha and beta band frequencies (4–23 Hz), respectively, under the condition of no odor stimulation while tasting chocolate (mean ± SE). b Mean areal occupancy rates under the conditions of garlic odor stimulation while tasting chocolate and no odor stimulation while tasting chocolate, respectively (mean ± SE). Differences in areal occupancy rates between the two conditions are compared among the theta, alpha and beta frequency bands. Asterisk indicates that the difference is significantly greater in the theta frequency band than in the other frequency bands. c Comparison of mean areal occupancy rates under conditions of chocolate odor stimulation while tasting chocolate and no odor stimulation while tasting chocolate (mean ± SE). Differences in areal occupancy rates between the two conditions are compared among the theta, alpha and beta frequency bands. Note that there are no significant differences in areal difference values among the three frequency bands