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- K Ishihara, M Kawamura, E Kaga, T Katoh, and J Shiota.
- Department of Neurology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8666, Japan.
- No To Shinkei. 2000 Nov 1;52(11):979-83.
AbstractWe describe three patients presenting themselves with amnesia following herpes simplex encephalitis. All three patients showed anterograde amnesia. Moreover, one patient showed retrograde amnesia extending about fifty years prior to the onset of the illness. Two patients revealed semantic memory disorder, disinhibitory behaviors and confabulations, which suggested the existence of frontal lobe dysfunction. MRI of all three patients disclosed uni- or bilateral temporal lesions. SPECT images showed decreased uptake not only in the temporal lobes but also in the frontal lobes. Amnesia following herpes simplex encephalitis has been thought to be caused by the temporal lobe disorder. However, we postulate that the frontal lobe dysfunction might contribute to the appearance of amnesia.
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