Memory deficits due to brain injury: unique PET findings and dream alterations.
The authors herein report the case of a young male with memory deficits due to a traumatic head injury, who presented with sleep-related symptoms such as hypersomnia and dream alterations. Although MRI and polysomnography showed no abnormalities, (18)F-fluorodeoxyglucose positron emission tomography (FDG-PET) and (11)C flumazenil (FMZ)-PET revealed findings consistent with cerebral damage to the affected temporal region. The memory deficit of the patient gradually improved in parallel with the relief of the sleep-related symptoms. FDG-PET showed considerable improvement in glucose metabolism when he had recovered, however, evidence of neural loss remained in the FMZ-PET findings.
Section of Psychiatry and Behavioral Science, Tokyo Medical and Dental University Graduate School, Bunkyo, Japan. masaki.nishida@gmail.com
Masaki
M
Nishida
Tadashi
T
Nariai
Mikio
M
Hiura
Kenji
K
Ishii
Toru
T
Nishikawa
D000293:Adolescent; D001930:Brain Injuries / Q000150:complications*; D001931:Brain Mapping; D004325:Dreams; D006801:Humans; D008297:Male; D008569:Memory Disorders / Q000000981:diagnostic imaging* / Q000209:etiology* / Q000534:rehabilitation; D049268:Positron-Emission Tomography