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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1994 Aug 16;91(17):8010–8013. doi: 10.1073/pnas.91.17.8010

Evidence for aberrant auditory anatomy in developmental dyslexia.

A M Galaburda 1, M T Menard 1, G D Rosen 1
PMCID: PMC44534  PMID: 8058748

Abstract

Abnormal auditory processing in dyslexics suggests that accompanying anatomical abnormalities might be present in the auditory system. Therefore, we measured cross-sectional neuronal areas in the medial geniculate nuclei (MGNs) of five dyslexic and seven control brains. In contrast to controls, which showed no asymmetry, the left-side MGN neurons were significantly smaller than the right in the dyslexic sample. Also, as compared with controls, there were more small neurons and fewer large neurons in the left dyslexic MGN. These findings are consistent with reported behavioral findings of a left hemisphere-based phonological defect in dyslexic individuals.

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Selected References

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