Olfactory-induced synesthesias: A review and model

Richard J. Stevenson*, Caroline Tomiczek

*Corresponding author for this work

    Research output: Contribution to journalReview articlepeer-review

    62 Citations (Scopus)

    Abstract

    Recent reviews of synesthesia concentrate upon rare neurodevelopmental examples and exclude common olfactory-induced experiences with which they may profitably be compared. Like the neurodevelopmental synesthesias, odor-induced experiences involve different sensory modalities; are reliable, asymmetric (concurrents cannot induce), and automatic; and the inducer-concurrent relationship is learnt. Unlike neurodevelopmental synesthesias, these experiences are universal and their synesthetic nature goes unrecognized. Olfaction's ability to universally induce concurrents may result from its unique neuroanatomy, affording dual access to neocortex. We propose that concurrents arise here via a twofold process: by direct neocortical activation, which recovers a configural memory, and by attribution of this memory to the olfactory modality by thalamic attentional processes. The implications of this for other forms of synesthesia are then examined.

    Original languageEnglish
    Pages (from-to)294-309
    Number of pages16
    JournalPsychological Bulletin
    Volume133
    Issue number2
    DOIs
    Publication statusPublished - Mar 2007

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