Serial Eeg Studies in Presenile Dementia

Abstract

Longitudinal EEG studies in primary presenile dementia are conspicuously lacking (Kiloh and Osselton, 1966). Letemendia and Pampiglione (1958) found no changes, over a one year period, in the EEG patterns of several of their patients with Alzheimer's disease. Attention has recently been drawn to the relevance of duration of the particular illness when interpreting EEG data in primary presenile dementia (Gordon and Sim, 1967). The tendency to non-specificity of such data in this group of diseases underlines the importance of chronological variations in the EEGs, with regard to both differential diagnosis and prognosis.