Neuron
Volume 48, Issue 3, 3 November 2005, Pages 509-520
Journal home page for Neuron

Review
Neurocognitive Mechanisms of Synesthesia

https://doi.org/10.1016/j.neuron.2005.10.012Get rights and content
Under an Elsevier user license
open archive

Summary

Synesthesia is a condition in which stimulation of one sensory modality causes unusual experiences in a second, unstimulated modality. Although long treated as a curiosity, recent research with a combination of phenomenological, behavioral, and neuroimaging methods has begun to identify the cognitive and neural basis of synesthesia. Here, we review this literature with an emphasis on grapheme-color synesthesia, in which viewing letters and numbers induces the perception of colors. We discuss both the substantial progress that has been made in the past fifteen years and some open questions. In particular, we focus on debates in the field relating to the neural basis of synesthesia, including the relationship between synesthesia and attention and the role of meaning in synesthetic colors. We propose that some, but probably not all, of these differences can be accounted for by differences in the synesthetes studied and discuss some methodological implications of these individual differences.

Cited by (0)

1

Current address: INSERM Unité 562 - Neuroimagerie Cognitive, Service Hospitalier Frédéric Joliot CEA, 4 pl. du Général Leclerc, Orsay, F91401 France.