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Pure alexia from a posterior occipital lesion

See also page 699From the Department of Neurology (Drs. Sakurai and Mannen), Mitsui Memorial Hospital, Tokyo; and the Department of Neurology (Dr. Ichikawa), Graduate School of Medicine, University of Tokyo, Japan.

Address correspondence and reprint requests to Dr. Yasuhisa Sakurai, Department of Neurology, Mitsui Memorial Hospital, 1, Kanda-Izumi-cho, Chiyoda-ku, Tokyo, 101-8643, Japan; e-mail: ysakurai{at}mitsuihosp.or.jp

The authors report a patient with pure alexia (letter-by-letter reading) selectively impaired for kana (Japanese phonograms), cerebral achromatopsia, and right lower quadrantanopsia after hemorrhage in the left posterior occipital lobe, mainly under the lateral occipital gyri. The patient also could not recognize some single-character kana, nor could he discriminate between two shapes of a similar size. The authors believe that the posterior occipital lobe, including the lateral occipital gyri, is specialized to recognize kana characters in this patient.

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