Abstract
Synesthesia is an experience in which stimulation in one sensory or
cognitive stream leads to associated experiences in a second, unstimulated
stream. Although synesthesia is often referred to as a "neurological
condition," it is not listed in the DSM IV or the ICD classifications,
as it generally does not interfere with normal daily functioning.
However, its high prevalence rate (one in 23) means that synesthesia
may be reported by patients who present with other psychiatric symptoms.
In this review, I focus on recent research examining the neural basis
of the two most intensively studied forms of synesthesia, grapheme
--> color synesthesia and tone --> color synesthesia. These data
suggest that these forms of synesthesia are elicited through anomalous
activation of color-selective areas, perhaps in concert with hyperbinding
mediated by the parietal cortex. I then turn to questions for future
research and the implications of these models for other forms of
synesthesia.
- association,cerebral
- cortex,cerebral
- cortex,visual
- cortex:
- disorders,perceptual
- disorders:
- imaging,magnetoencephalography,models,neurological,parietal
- lobe,parietal
- lobe:
- perception,color
- perception,pitch
- perception,visual
- perception:
- physiology
- physiology,electroencephalography,humans,magnetic
- physiology,positron-emission
- physiology,visual:
- physiopathology,color
- physiopathology,pattern
- physiopathology,pitch
- physiopathology,visual
- recognition,perceptual
- resonance
- tomography,reading,semantics,visual,visual
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