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Division of Behavioral Neurology and Cognitive Neuroscience, Department of Neurology, University of Iowa College of Medicine, Iowa City, IA.
We studied a 17-year-old boy with colored hearing synesthesia (chromesthesia), using psychophysical and neurophysiologic tests. Specific musical notes consistently evoked the same color hues. Unlike controls, he could make new musical note-color associations in a single trial. Auditory evoked potential studies showed no evidence of abnormal activation. The results in this subject do not favor the notion that chromesthesia was due to aberrant neural transmission in collateral pathways, and support the alternative hypothesis that chromesthesia results from strong cross-modal associative ability.
Address correspondence and reprint requests to Dr. Rizzo, Department of Neurology, The University of Iowa Hospitals, Iowa City, IA 52242.
Supported by NINCDS Program Project Grant #PO NS 19632.
Received October 25, 1988. Accepted for publication in final form January 9, 1989.
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