title: Odor mental imagery in non-experts in odors: a paradox?
abstract: In agreement with the theoretical framework stipulating that mental images arise from neural activity in early sensory cortices, the primary olfactory cortex [i.e., the piriform cortex (PC)] is activated when non-olfactory-experts try to generate odor mental images. This finding strongly contrasts with the allegation that it is typically impossible to mentally imagine odors. However, other neurophysiological or cognitive processes engaged in the endeavor of odor mental imagery such as sniffing, attention, expectation, and cross-modal interactions involve the PC and could explain this paradox. To unambiguously study the odor mental imagery, we first argued the need to investigate odor experts who have learned to specifically reactivate olfactory percepts. We then assert the necessity to explore the network dedicated to this function by considering variations in both the activity level and the connection strength of the areas belonging to this network as a function of the level of expertise of the odor experts.
authors.affiliation: Olfaction: From Coding to Memory Team, Lyon Neuroscience Research Center, Centre National de la Recherche Scientifique, CNRS UMR 5292, INSERM U1028, University Lyon 1 Lyon, France.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Royet
authors.forename: Chantal
authors.initials: C
authors.lastname: Delon-Martin
authors.forename: Jane
authors.initials: J
authors.lastname: Plailly
keywords: functional reorganization; odor mental imagery; perfumer; piriform cortex; vividness