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Scientists Probe the Origins of Dyslexia
Date:12/21/2011

control-group members), were abnormalities in the left auditory cortex of the brain.

The brains of people with dyslexia may "overreact" to phonemes at high-frequency rhythms. This could interfere with verbal memory and, hence, speech, the study found.

"The left auditory cortex may be less responsive to certain sound frequencies that are optimal [for processing] phonemes," Adesman explained.

Although the research is "important," said Dr. Harold Levinson, clinical/research director of the Levinson Medical Center for Learning Disabilities in Great Neck, N.Y., it may not take into account the complexity of dyslexia and the many brain processes involved.

The particular brain abnormalities identified in this study may just be a reflection of other problems in the cerebellum region of the brain, he said.

A number of questions remained unanswered, Levinson added.

More information

The U.S. National Library of Medicine has more on dyslexia.

SOURCES: Andrew Adesman, M.D., chief, developmental and behavioral pediatrics, Steven & Alexandra Cohen Children's Medical Center of New York, New Hyde Park, N.Y.; Harold Levinson, M.D., clinical/research director, Levinson Medical Center for Learning Disabilities, Great Neck, N.Y.; Dec. 22, 2011, Neuron


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