Abstract
ABSTRACT.We report an 85-year-old patient with a history of an old right hemispheric cerebral infarction who was admitted in a coma state. The brain MRI showed an old large right basal ganglia infarction and multiple acute occipital, brainstem, and cerebellar infarctions. The EEG showed nonreactive diffuse rhythmic 9 Hz activity over the left hemisphere and low voltage arrhythmic slowing over the right hemisphere.We postulate that the acute brainstem infarctions are likely the cause of the alpha-coma pattern over the unaffected left hemisphere and the large right basal ganglia infarctions prevented the generation of the alpha activity over the right hemisphere.
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