Ten patients with a clinical diagnosis of frontal lobe degeneration (FLD) were compared with a group of patients with probable Alzheimer’s disease (AD) and with nondemented controls matched for gender and age. In comparison with AD, the duration of illness was slightly shorter and cognitive performance was better in patients with FLD. The greatest enlargement of cerebro-spinal fluid volumes was found in FLD and this effect was most pronounced in the anterior fissure and lateral ventricles. Estimates of EEG band-power and EEG coherence in FLD were not remarkably different from nondemented controls, whereas delta- and theta-power were significantly increased in AD. These observations may indicate different disease processes with a dissociation of volumetric computed tomography and quantitative EEG changes, which may be of differential diagnostic value.

Keywords:
Frontal lobe degeneration, Alzheimer’s disease, Computed tomography, Electroencephalography
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© 1996 S. Karger AG, Basel
1996
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