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A 69-year-old right-handed man was admitted to our department because of an anterograde amnesia. Additionally, signs of retrograde amnesia were present affecting the day before admission and events from the recent past in particular. The episode started during gardening. The patient was oriented regarding his personal identity, location and situation, but disoriented about time. There was no clouding of consciousness. In addition to repetitive questioning, we noticed an amnestic aphasia. There were no pre-existing diseases and he had not experienced a similar episode before. The neurological examination revealed no other neurological deficits, especially no focal motor or sensory signs. Laboratory examination did not reveal any abnormalities except for dylipidaemia. The EEG showed an alpha basic rhythm with a few scattered left-sided accentuated steep transients without focal slowing and without typical epileptiform discharges.
On day 1 after admission the patient’s symptoms had resolved completely, an amnesic gap of about 8 hours remained.