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NEUROLOGY 1985;35:352
© 1985 American Academy of Neurology

Central auditory function in Alzheimer's disease

Alison M. Grimes, Cheryl L. Grady, Norman L. Foster, Trey Sunderland and Nicholas J. Patronas

Clinical Center (Ms. Grimes and Dr. Patronas), The National Institutes of Health, The National Institute on Aging (Dr. Grady), The National Institute of Neurological and Communicative Disorders and Stroke (Dr. Foster), and The National Institute of Mental Health (Dr. Sunderland). Bethesda, MD.

The central auditory (dichotic) function of 38 patients with Alzheimer's disease was found to be significantly impaired when compared with a control group. Significant relationships were observed between dichotic scores and intelligence quotient, cortical atrophy in the temporal lobes, and cerebral glucose metabolism in the left temporal lobe. Comparing atrophy and glucose metabolism in the temporal lobes, we observed contralateral ear effects in dichotic performance as well as an interaction of asymmetry of atrophy with dichotic performance, consistent with previous models of dichotic listening in other forms of temporal lobe pathology.

Address correspondence and reprint requests to Alison M. Grimes, Audiology Clinic, National Institutes of Health, Building 10 Room 5C306, Bethesda, MD 20205.

Accepted for publication June 27, 1984.




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