Isolated prolonged retrograde amnesia.
We describe a patient who had isolated retrograde amnesia of 1-year duration without anterograde amnesia after recovery from encephalitis. Single photon emission computed tomography using 123I-IMP revealed that left temporal lobe abnormality. We postulate that the learning ability for new information and recalling ability for old information involve different neural structures, and there is a possible relationship between isolated retrograde amnesia and left temporal dysfunction.
Yoneda
Y
Y
Neurology Service, Hyogo Brain and Heart Center, Himeji, Japan.
Yamadori
A
A
Mori
E
E
Yamashita
H
H
D000328:Adult; D000648:Amnesia, Retrograde / Q000000981:diagnostic imaging* / Q000503:physiopathology; D004292:Dominance, Cerebral / Q000502:physiology; D004660:Encephalitis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006801:Humans; D008297:Male; D011939:Mental Recall / Q000502:physiology; D009483:Neuropsychological Tests; D010296:Parietal Lobe / Q000000981:diagnostic imaging / Q000502:physiology; D012153:Retention, Psychology / Q000502:physiology; D013702:Temporal Lobe / Q000000981:diagnostic imaging / Q000503:physiopathology; D015899:Tomography, Emission-Computed, Single-Photon