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1/2. Migrainous stroke causing bilateral anterior cerebral artery territory infarction.

    A 38-year-old man developed bilateral anterior cerebral artery territory infarction during the course of a migraine. magnetic resonance imaging showed bilateral ischemic lesions involving the cortex of the paramedian region of the frontal and parietal lobes, more prominent on the right. cerebral angiography was normal. To our knowledge, this is the first report of bilateral anterior cerebral artery territory infarction from migraine.
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keywords = cortex
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2/2. Event-related brain potentials in a patient with akinetic mutism.

    The clinical pattern of complete akinetic mutism (AM) was observed in a patient with a bilateral infarction of the anterior cerebral arteries extending to the rostral cingulate cortex and the supplementary motor areas. Since the patient was unable to produce any overt response, event-related brain potentials (ERPs) were used to obtain information about cortical processing of stimuli. Oddball tasks with simple acoustical stimuli and semantic categories were used. Verbal processing was further assessed by comparing event-related potentials to words compatible versus incompatible to the semantic context. Although the pattern of cortical responses was abnormal, differential responses were clearly obtained to semantically different word classes. Thus, the hypothesis about cortical non-responsivity of AM patients, drawn from several previous reports, was not supported. An ERP examination in AM patients can deliver information about their mental state, provided that the stimuli and tasks possess a wide range of informational complexity and motivational value.
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keywords = cortex
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