POSTUREMeDIBRnm L 1491 dystonia. It is perhaps too early to draw any conclusions from this, but the facts just quoted may suggest that extrapyramidal rigidity and disturbances of posture are due to abnormal impulses descending from above the brain-stem level.

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Fruhling and his co-workers' put forward the thesis of viral origin for morphological, virological, and epidemiological reasons. These authors studied 81 necropsies of chil-

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