title: Topographic CNV activity mapping, presenile mild primary cognitive decline and Alzheimer-type dementia.
abstract: The CNV complex evoked with a standard paradigm (S1-2 sec-S2-motor response) and reaction time (RT) to the imperative signal (S2) were recorded and measured in 12 patients with initial presenile idiopathic cognitive decline (PICD), 12 with presenile Alzheimer-type dementia (PAD) and 10 healthy age-matched controls. Significant group differences were obtained for measures of some CNV components, particularly of the late pre-S2 CNV. No significant CNV activity, very prolonged RTs and sometimes characteristic post-imperative negative variations (PINV) were observed in the majority of patients with PAD. These results suggest that similar CNV complex and RT changes to those observed in our patients may constitute a valuable clue in the study of pathophysiological brain functioning in the early stages of presenile idiopathic mental deterioration.
authors.affiliation: Department of Neurological and Psychiatric Sciences, University of Florence, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Zappoli
authors.forename: A
authors.initials: A
authors.lastname: Versari
authors.forename: G
authors.initials: G
authors.lastname: Arnetoli
authors.forename: M
authors.initials: M
authors.lastname: Paganini
authors.forename: G C
authors.initials: GC
authors.lastname: Muscas
authors.forename: M G
authors.initials: MG
authors.lastname: Arneodo
authors.forename: P F
authors.initials: PF
authors.lastname: Gangemi
authors.forename: M
authors.initials: M
authors.lastname: Bartelli
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000503:physiopathology* / Q000523:psychology; D001921:Brain / Q000503:physiopathology*; D001931:Brain Mapping; D003072:Cognition Disorders / Q000503:physiopathology* / Q000523:psychology; D003265:Contingent Negative Variation; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D011446:Prospective Studies; D011930:Reaction Time / Q000502:physiology