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While developmental synesthesia likely has a genetic origin, there are also ways to develop synesthesia. Acquired synesthesia is a form of synesthesia that can materialize later on in life, usually following a brain injury or the loss of sensory input to the central nervous system from afferent nerves, which is called sensory deafferentation.
Synesthesia (American English) or Synaesthesia (British English) is a perceptual phenomenon in which stimulation of one sensory or cognitive pathway leads to involuntary experiences in a second sensory or cognitive pathway.
Examples include synesthesia, sensory substitution and the McGurk effect, in which vision and hearing interact in speech perception. Crossmodal perception, crossmodal integration and cross modal plasticity of the human brain are increasingly studied in neuroscience to gain a better understanding of the large-scale and long-term properties of ...
Wednesday Is Indigo Blue: Discovering the Brain of Synesthesia is a 2009 non-fiction book written by Richard Cytowic and David Eagleman documenting the current scientific understanding of synesthesia, a perceptual condition where an experience of one sense (such as sight) causes an automatic and involuntary experience in another sense (such as hearing). [1]
A study using magnetoencephalography has shown that color information is available in the brain signal ~200 milliseconds later when accessed via synesthesia in comparison to direct color perception, which is consistent with conceptual mediation. [37] The study supports the idea that synesthesia is a semantic phenomenon – i.e., ideasthesia.
This is most apparent in grapheme-color synesthesia, because the brain regions for color processing and visual word form processing are adjacent. [17] Individuals with chromesthesia show activation of brain areas involved in visual processing, such as V4, immediately after the auditory perception, indicating an automatic linking of sounds and ...
In Flournoy's 1893 reports on OLP, one synesthete identified as Mme L. reports that "1, 2, 3 are children without fixed personalities; they play together. 4 is a good peaceful woman, absorbed by down-to-earth occupations and who takes pleasure in them. 5 is a young man, ordinary and common in his tastes and appearance, but extravagant and self-centered. 6 is a young man of 16 or 17, very well ...
Cytowic describes how an article about his work on synesthesia in the tabloid The National Enquirer, a publication which is "not known to help one's career", [7] led to his first contacts with synesthetes beyond MW [8] These personal accounts of synesthesia, described here in more autobiographical style, also form the basis of Cytowic's more ...