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January 1979

Pure Memory Loss With Hippocampal Lesions: A Pneumoencephalographic Study

Author Affiliations

From the Department of Neurology, Institute of Brain Research, Faculty of Medicine, University of Tokyo (Drs Muramoto, Sugishita, and Toyokura), and the Department of Radiology, Juntendo University Medical School, Tokyo (Dr Kuru).

Arch Neurol. 1979;36(1):54-56. doi:10.1001/archneur.1979.00500370084024

• A case of pure memory loss occurred suddenly following inhalation anesthesia. Examination seven years after the onset of amnesia disclosed a profound and selective impairment of recent memory without concomitant deterioration of other higher functions or evidence of other neurologic abnormalities. Pneumoencephalotomography focused on the temporal horns showed severe atrophicchanges confined to both hippocampi. This finding provides a rediologic counterpart of previously reported surgical and pathological observations of bilateral hippocampal lesions in cases with relatively pure loss of memory.