A 43-year-old man developed severe global amnesia with uncinate fits and a single generalised convulsion 10 days after a febrile infection. CSF pleocytosis and serological findings indicated an acute Epstein-Barr virus encephalitis. All of the symptoms cleared within 2 weeks except for occasional generalised seizures. This seems to be the first observation of Epstein-Barr virus encephalitis presenting predominantly as transient global amnesia.
Brain-stem auditory evoked potentials (BAEPs) and the acoustic stapedius reflex (ASR) were recorded in 68 patients with definite, probable and possible multiple sclerosis (using the definitions of McAlpine). The high incidence of abnormal results, 68% and 60%, respectively, pointed to the diagnostic value of these two measures in detecting brain-stem dysfunction. Combination of the methods increased the diagnostic yield to 85%. Since in part the same brain-stem generator sites underlie BAEPs and the ASR, it was considered that a study of their correlation might serve to increase the reliability and validity of these techniques. There was 71% agreement overall between results from the two measures. Furthermore, 72% of the joint BAEP and ASR abnormalities corresponded in detection of the brain-stem lesion site. It was concluded that the combined approach may supply powerful, complementary information on brain-stem dysfunction, which may aid in establishing the diagnosis of multiple sclerosis.
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