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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.
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]
Synesthesia is when input from one sense triggers the brain to associate it ... and that condition is called synesthesia. It will be the topic of today’s column. ... Have other possible effects ...
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 ...
Self-reports, interviews, and autobiographical notes by synesthetes demonstrate a great degree of variety in types of synesthesia, the intensity of synesthetic perceptions, awareness of the perceptual discrepancies between synesthetes and non-synesthetes, and the ways synesthesia is used in work, creative processes, and daily life.
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.
In many forms, more well-known words and words used with a higher frequency are more likely to have a strong taste association [2] [7] The phonological roots associated with this form of synesthesia drive the current research on lexical–gustatory synesthesia to determine which parts of the brain are active in synesthetes causing the ...
Eagleman is the developer of The Synesthesia Battery, a free online test by which people can determine whether they are synesthetic. [57] By this technique he has tested and analyzed thousands of synesthetes, [58] and has written a book on synesthesia with Richard Cytowic, entitled Wednesday is Indigo Blue: Discovering the Brain of Synesthesia. [7]