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Neurology 2000;54:522
© 2000 American Academy of Neurology
Brief Communications

Right frontal areas 6 and 8 are associated with simultanapraxia, a subset of motor impersistence

Y. Sakai, MD, T. Nakamura, MD, A. Sakurai, MD, H. Yamaguchi, MD and S. Hirai, MD

From Gunma University School of Health Sciences, Gunma, Japan.

Address correspondence and reprint requests to Dr. Yasujiro Sakai, Gunma University School of Health Sciences, 3-39-15 Showa-machi, Maebashi, Gunma 371-8514, Japan; e-mail: ysakai{at}akagi.sb.gunma-u.ac.jp

The authors examined brain lesions that cause simultanapraxia, a subset of motor impersistence. Simultanapraxia was defined as the inability to perform two motor acts simultaneously: closing the eyes and protruding the tongue. Simultanapraxia was found in 9 (5.6%) of 160 hospitalized patients with cerebrovascular diseases. The lesions were located in areas 6 and 8 in the right middle cerebral artery territory. This site was spared in five patients who did not show simultanapraxia, even with a large infarction in the right middle cerebral artery area.

Key words: Simultanapraxia—Right frontal areas 6 and 8—Motor impersistence




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