Enhanced sensory perception in synaesthesia.
Previous findings imply that synaesthetic experience may have consequences for sensory processing of stimuli that do not themselves trigger synaesthesia. For example, synaesthetes who experience colour show enhanced perceptual processing of colour compared to non-synaesthetes. This study aimed to investigate whether enhanced perceptual processing was a core property of synaesthesia by contrasting tactile and colour sensitivity in synaesthetes who experience either colour, touch, or both touch and colour as evoked sensations. For comparison the performance of non-synaesthetic control subjects was also assessed. There was a relationship between the modality of synaesthetic experience and the modality of sensory enhancement. Synaesthetes who experience colour have enhanced colour sensitivity and synaesthetes who experience touch have enhanced tactile sensitivity. These findings suggest the possibility that a hyper-sensitive concurrent perceptual system is a general property of synaesthesia and are discussed in relation to theories of the condition.
Banissy
Michael J
MJ
Department of Cognitive, Perceptual and Brain Sciences, Institute of Cognitive Neuroscience, University College London, London, WC1N 3AR, UK. m.banissy@ucl.ac.uk
Walsh
Vincent
V
Ward
Jamie
J
D000328:Adult; D000344:Afferent Pathways / Q000502:physiology; D002490:Central Nervous System / Q000502:physiology*; D055253:Color Vision / Q000502:physiology*; D005260:Female; D006801:Humans; D006941:Hyperesthesia / Q000503:physiopathology*; D008297:Male; D009483:Neuropsychological Tests; D009949:Orientation / Q000502:physiology; D010775:Photic Stimulation; D010812:Physical Stimulation; D011601:Psychophysics / Q000379:methods; D012684:Sensory Thresholds / Q000502:physiology*; D013003:Somatosensory Cortex / Q000502:physiology; D014110:Touch / Q000502:physiology*; D055698:Touch Perception / Q000502:physiology*; D014793:Visual Cortex / Q000502:physiology; D014796:Visual Perception / Q000502:physiology