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Swelling of neuronal processes in motor neuron disease

From the Department of Neurology (Drs. Sasaki, Kamei, and Maruyama), Neurological Institute, Tokyo Women's Medical College, Tokyo; and the Department of Neurology (Dr. Yamane), Atami General Hospital, Koriyama, Japan.

We investigated serial sections of the anterior horns of the lower lumbar cord by a modified Bielschowsky's silver impregnation, in a case of sporadic lower motor neuron disease. We paid special attention to any direct connection between the swellings of neuronal processes and the perikarya. Focal swellings of neuronal processes were occasionally directly connected with the perikarya; some had morphologic peculiarities of axons, and others originated in dendrites.

Address correspondence and reprint requests to Dr. Sasaki, Neurological Institute, Department of Neurology, Tokyo Women's Medical College, 8–1 Kawada-Cho, Shinjuku-ku, Tokyo 162, Japan.

Received July 15, 1987. Accepted for publication in final form November 20, 1987.