Acute Infarctions of the Brain Stem in the Distribution of the Basilar Artery

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Abstract
A clinical and pathologic study of 83 cases of brain stem infarction was presented. These were divided into: paramedian pons syndrome with pontine hemiplegia; bilateral pons syndrome with pontine quadriplegia; paramedian and lateral pons syndrome with alternating hemiplegia, and tegmental pons syndrome with clinical pictures depending upon the location and level of the lesions. Alternating syndromes are rare. The chief features in 11 cases of thrombosis of the basilar artery were summarized. Transient ischemic episodes, some with a stepwise pattern, occurred with and without thrombosis. Convulsions, mental changes, hemiplegia, and pseudobulbar palsy are emphasized since they are usually identified with cerebral lesions. A clinical and pathologic correlation of the chief symptoms was presented.