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Brain has center for detecting sound motion

eport that "there was a humming sound coming toward [her] face."

When the researchers presented moving sounds to the patient while they recorded from the electrodes, they also detected the strongest activity in the right posterior STG.

After the operation, however, the patient showed what the researchers dubbed "cortical motion deafness." During perceptual tests, she stated "I do not perceive the sounds as moving at all, but rather as being completely stable." In contrast, she could still perceive the location of sounds and their identity. Also, all her visual abilities remained normal.

While her ability to detect sound motion improved over the next three years, she still remained deficient. According to the researchers, such improvement likely was due to partial recovery because of adaptive changes in her cortex.

According to the researchers, their findings "provide evidence of an auditory motion module within the right posterior STG" and that by analogy with the motion-detection region of the visual system this region "may constitute the core region for auditory motion analysis."


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Contact: Heidi Hardman
hhardman@cell.com
617-397-2879
Cell Press
15-Sep-2004


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