title: Smell and taste of chewing gum affect frequency domain EEG source localizations.
abstract: We investigated brain electric field signatures of subjective feelings after chewing regular gum or gum base without flavor. 19-channel eyes-closed EEG from 20 healthy males before and after 5 minutes of chewing the two gum types in random sequence was source modeled in the frequency domain using the FFT-Dipole-Approximation. 3-dimensional brain locations and strengths (Global Field Power, GFP) of the equivalent sources of five frequency bands were computed as changes from pre-chewing baseline. Gum types differed (ANOVA) in pre-post changes of source locations for the alpha-2 band (to anterior and right after regular gum, opposite after gum base) and beta-2 band (to anterior and inferior after regular gum, opposite after gum base), and of GFP for delta-theta, alpha-2 and beta-1 (regular gum: increase. gum base: decrease). Subjective feeling changed to more positive values after regular gum than gum base (ANOVA).--Thus, chewing gum with and without taste-smell activates different brain neuronal populations.
authors.affiliation: The KEY Institute for Brain-Mind Research, University Hospital of Psychiatry, Zurich, Switzerland.
authors.forename: T
authors.initials: T
authors.lastname: Yagyu
authors.forename: I
authors.initials: I
authors.lastname: Kondakor
authors.forename: K
authors.initials: K
authors.lastname: Kochi
authors.forename: T
authors.initials: T
authors.lastname: Koenig
authors.forename: D
authors.initials: D
authors.lastname: Lehmann
authors.forename: T
authors.initials: T
authors.lastname: Kinoshita
authors.forename: T
authors.initials: T
authors.lastname: Hirota
authors.forename: T
authors.initials: T
authors.lastname: Yagyu
mesh_terms: D000328:Adult; D001931:Brain Mapping; D002638:Chewing Gum; D004566:Electrodes; D004569:Electroencephalography / Q000187:drug effects* / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D012903:Smell / Q000502:physiology*; D013649:Taste / Q000502:physiology*
chemical_list: D002638:Chewing Gum