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Hearing colors, seeing sounds: New research explores sensory overlap in the brain
Date:11/16/2010

SAN DIEGO New research indicates that the integration of senses and functions in the brain is common. About two percent of the population has a condition called synesthesia, in which two different sensations, like color and sound, are experienced at once. Although this condition is rare, the new findings suggest the brain is wired in complex and sometimes overlapping ways to help people interpret and understand their environments. The research was presented at Neuroscience 2010, the annual meeting of the Society for Neuroscience and the world's largest source of emerging news on brain science and health.

Today's new findings show that:

  • Researchers have pinpointed the brain region responsible for the McGurk Effect, an auditory phenomenon in which viewing lips moving out of sync with words creates the perception of other words. A brain area known to play a role in language and eye gaze processing is the hub of the sensory overlap (Michael Beauchamp, PhD, abstract 400.2, see attached summary).

  • People adjust the perceived location of sensory stimuli faster than previously thought. Results show that exposure to light for only a fraction of a second alters the perceived source of a subsequent sound. The findings have implications for the development of hearing aids and rehabilitation from brain injury (Ladan Shams, PhD, abstract 125.1, see attached summary).

Other recent findings discussed show that:

  • Synesthetes who describe colors as either inside their minds or outside in the world have distinct brain structures and processes (Romke Rouw, PhD, see attached speaker's summary).

  • People who share one type of synesthesia, in which letters and numbers create the experience of color, describe drastically different sensations from one another. This indicates that synesthetic experiences are more idiosyncratic than is commonly realized (Avinash Vaidya, see attached sp
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Contact: Kat Snodgrass
ksnodgrass@sfn.org
202-962-4090
Society for Neuroscience
Source:Eurekalert

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