title: [Triphasic waves in dementia syndromes].
abstract: Seventy-one EEGs (0.49%) of 53 patients, out of 14,458 recordings, contained triphasic waves: twenty-nine were patients with metabolic encephalopathies and 24 were demented patients (16 of these had a presumptive diagnosis of Alzheimer's disease and the other eight of mult-infarct dementia). Demented subjects with metabolic disorders are included in the metabolic encephalopathies group. In all of the cases of Alzheimer's disease, triphasic waves were atypical: in 14 they occurred singly or in short bursts, in 10 they had occipital predominance and in 2 they were bilateral but asymmetrical. In 5 cases, triphasic waves were associated with myoclonus and in 2 of them they occurred in long runs with a pseudo-periodic pattern. In these cases the distinction from Creutzfeldt-Jakob disease was based on neuropathologic findings.
authors.affiliation: Istituto di Clinica Neurologica, Università, Genova.
authors.forename: A
authors.initials: A
authors.lastname: Primavera
authors.forename: F
authors.initials: F
authors.lastname: Traverso
authors.forename: P
authors.initials: P
authors.lastname: Perfumo
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000503:physiopathology*; D001928:Brain Diseases, Metabolic / Q000503:physiopathology*; D015161:Dementia, Multi-Infarct / Q000503:physiopathology*; D004569:Electroencephalography; D006801:Humans; D008875:Middle Aged
vernacular_title: Le onde trifasiche nelle sindromi demenziali.