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NEUROLOGY 1982;32:235
© 1982 American Academy of Neurology

Right thalamic injury, impaired visuospatial perception, and alexia

Victor W. Henderson, M.D., Michael P. Alexander, M.D. and Margaret A. Naeser, Ph.D.

Department of Neurology, Boston University School of Medicine, Boston, MA.

In pure alexia, acquired inability to read contrasts with normal speech and handwriting. Rare cases of right hemisphere lesions causing this syndrome are usually attributed to right hemisphere dominance for language. After infarction of the right occipital lobe and thalamus, a fully right-handed man became allelic, but language and spontaneous and dictated writing were intact. Left hemispatial neglect and constructional disturbances were marked, and we suggest that pure alexia was mimicked by the impairment in visuospatial perception. Injury of the no dominant hemisphere and thalamus together may have been important in causing these deficits.

Address correspondence and reprint requests to Dr. Henderson, Department of Neurology, McKibben 142, University of Southern California School of Medicine, 2025 Zonal Avenue, Los Angeles, CA 90033.

Supported in part by USPHS Grants Nos. NS06209 and NS07615.

Presented in part at the thirty-third annual meeting of the American Academy of Neurology, Toronto, Canada, April 1981.

Accepted for publication August 4, 1981.




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