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Japanese crossed Wernicke's aphasia

From the Departments of Neurology, National Tokyo Hospital (Drs. Sakurai and Kurisaki); Institute of Brain Research, University of Tokyo School of Medicine (Drs. Talreda and Iwata); Tokyo Metropolitan Institute of Gerontology (Dr. Bandoh); and the Department of Radiology (Drs. Watanabe and Momose), University of Tokyo School of Medicine, Tokyo, Japan.

A right-handed Japanese man with no personal or family history of left-handedness developed severe Wernicke's aphasia, a mild constructional disorder, and slight left hemiparesis. MRI revealed infarction in the territory of the right middle cerebral artery, including areas homologous to Broca's and Wernicke's areas. The cerebral blood flow in these areas remained diminished even after language activation. The most likely explanation is that language production occurred in the left Broca's area, while language comprehension occurred in the right Wernicke's area (a dissociated aphasia).

Address correspondence and reprint requests to Dr. Yasuhisa Sakurai, Department of Neurology, Institute of Brain Research, University of Tokyo School of Medicine, 7–3–1, Hongo, Bunkyo-ku, Tokyo 113, Japan.

Received January 16, 1991. Accepted for publication in final form July 5, 1991.

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