Lexical-gustatory synaesthesia: linguistic and conceptual factors

This study documents an unusual case of developmental synaesthesia, in which speech sounds induce an involuntary sensation of taste that is subjectively located in the mouth. JIW shows a highly structured, non-random relationship between particular combinations of phonemes (rather than graphemes) and the resultant taste, and this is influenced by a number of fine-grained phonemic properties (e.g. allophony, phoneme ordering). The synaesthesia is not found for environmental sounds. The synaesthesia, in its current form, is likely to have originated during vocabulary acquisition, since it is guided by learned linguistic and conceptual knowledge. The phonemes that trigger a given taste tend to also appear in the name of the corresponding foodstuff (e.g. /I/, /n/ and /s/ can trigger a taste of mince /mIns/) and there is often a semantic association between the triggering word and taste (e.g. the word blue tastes "inky"). The results suggest that synaesthesia does not simply reflect innate connections from one perceptual system to another, but that it can be mediated and/or influenced by a symbolic/conceptual level of representation.

[1]  A. M. Hughes,et al.  Synaesthesia and major affective disorder , 1988, Acta psychiatrica Scandinavica.

[2]  Christopher T. Lovelace,et al.  Mechanisms of synesthesia: cognitive and physiological constraints , 2001, Trends in Cognitive Sciences.

[3]  R. Berndt,et al.  Category-specific naming deficit following cerebral infarction , 1985, Nature.

[4]  Hillary C. M. Nelson.  The National Adult Reading Test , 1982 .

[5]  Jamie Ward,et al.  A comparison of lexical-gustatory and grapheme-colour synaesthesia , 2005, Cognitive neuropsychology.

[6]  S. Baron-Cohen,et al.  Hearing Words and Seeing Colours: An Experimental Investigation of a Case of Synaesthesia , 1987, Perception.

[7]  L. Marks.  On colored-hearing synesthesia: cross-modal translations of sensory dimensions. , 1975, Psychological bulletin.

[8]  E. Bullmore,et al.  Functional magnetic resonance imaging , 2001 .

[9]  Daniel Smilek,et al.  Five plus two equals yellow , 2000, Nature.

[10]  Henry Kennedy,et al.  Synaesthesia: Implications for developmental neurobiology. , 1997 .

[11]  E. T. Bullmore,et al.  Functional magnetic resonance imaging of synesthesia: activation of V4/V8 by spoken words , 2002, Nature Neuroscience.

[12]  S. Landgren,et al.  Cortical reception of touch and taste in the cat; a study of single cortical cells. , 1957, Acta physiologica Scandinavica. Supplementum.

[13]  G. Paxinos,et al.  THE HUMAN NERVOUS SYSTEM , 1975 .

[14]  D. Perrett,et al.  A specific neural substrate for perceiving facial expressions of disgust , 1997, Nature.

[15]  Henry Edwin Rogers.  Theoretical and Practical Phonetics , 1991 .

[16]  F. Wood,et al.  Synesthesia II. Psychophysical relations in the synesthesia of geometrically shaped taste and colored hearing , 1982, Brain and Cognition.

[17]  Simon Baron-Cohen,et al.  Synaesthesia: Prevalence and Familiality , 1996, Perception.

[18]  J. Glicksohn,et al.  Cognitive Dedifferentiation in Eidetics and Synaesthesia: Hunting for the Ghost Once More , 1999, Perception.

[19]  Martha J. Farah,et al.  Semantically-bounded anomia: Implications for the neural implementation of naming , 1992, Neuropsychologia.

[20]  F. Wood,et al.  Synesthesia I. A review of major theories and their brain basis , 1982, Brain and Cognition.

[21]  D. Maurer.  Neonatal Synesthesia: Implications for the Processing of Speech And Faces , 1993 .

[22]  Trends in Synesthetically Colored Graphemes and Phonemes -- 2004 revision , 2004 .

[23]  E. Bullmore,et al.  Functional magnetic resonance imaging of synesthesia : activation of V 4 / V 8 by spoken words , 2002 .

[24]  Lawrence E. Marks,et al.  On colored-hearing synesthesia: cross-modal translations of sensory dimensions. , 1975 .

[25]  A. H. Pierce,et al.  Gustatory Audition; A Hitherto Undescribed Variety of Synaesthesia , 1907 .

[26]  Charles S. Myers,et al.  A CASE OF SYNAESTHESIA , 1911 .

[27]  Simon Baron-Cohen,et al.  Synaesthesia : classic and contemporary readings , 1997 .

[28]  G. M. Vaught,et al.  The incidence of eidetic imagery as a function of age. , 1976, Child development.

[29]  J. H. Flowers,et al.  An Investigation of the Cognitive and Perceptual Dynamics of a Colour–Digit Synaesthete , 1999, Perception.

[30]  Heinz J. Giegerich,et al.  English Phonology: An Introduction , 1992 .

[31]  S Baron-Cohen,et al.  The physiology of coloured hearing. A PET activation study of colour-word synaesthesia. , 1995, Brain : a journal of neurology.

[32]  J. Downey.  A Case of Colored Gustation , 1911 .

[33]  Glyn W. Humphreys,et al.  A verbal-semantic category-specific recognition impairment , 1993 .

[34]  W. Krohn.  Pseudo-chromesthesia, or the association of colors with words,letters and sounds. , 1892 .

[35]  W. J. Nowack.  Neurobiology of Neocortex , 1989, Neurology.

[36]  Jonathan Cole,et al.  The Man Who Tasted Shapes , 2003 .

[37]  J. Glicksohn,et al.  An Exploratory Study of Syncretic Experience: Eidetics, Synaesthesia and Absorption , 1992, Perception.

[38]  S. Baron-Cohen,et al.  Coloured Speech Perception: Is Synaesthesia what Happens when Modularity Breaks Down? , 1993, Perception.

[39]  V. Ramachandran,et al.  Synaesthesia? A window into perception, thought and language , 2001 .

[40]  S. Landgren.  Convergence of tactile, thermal, and gustatory impulses on single cortical cells. , 1957, Acta physiologica Scandinavica.

[41]  Peter G. Grossenbacher,et al.  Perception and sensory information in synaesthetic experience. , 1997 .

[42]  C. S. Lin,et al.  Taste memory induces brain activation as revealed by functional MRI. , 1999, Journal of computer assisted tomography.

[43]  J. E. Harrison,et al.  Synaesthesia: The Strangest Thing , 2001 .

[44]  Sven Landgkren.  Convergence of tactile, thermal, and gustatory impulses on single cortical cells. , 1957 .

[45]  P. Eslinger,et al.  Taste perception in patients with insular cortex lesions. , 1999, Behavioral neuroscience.