Accession Number : ADP006076

Title :   Fourth Generation Neurocognitive Pattern Analysis System,

Corporate Author : EEG SYSTEMS LAB SAN FRANCISCO CA

Personal Author(s) : Gevine, A. S. ; Morgan, N. H. ; Bressler, S. L. ; Greer, D. S.

Report Date : FEB 1988

Pagination or Media Count : 13

Abstract : We use the generic term 'Neurocognitive Pattern (NCP) Analysis' to refer to procedures being developed to extract spatiotemporal neurocognitive patterns from the unrelated neuroelectric 'noise' of the brain. Recordings with up to 64 scalp channels during highly controlled tasks are now routine in our laboratory, as is the extended signal processing sequence required to extract minute neurocognitive signals from gigabyte sets of single-trial data. More robust measures of the degree of 'functional interdependency' between electrodes have been developed and applied to several visuomotor and high-load cognitive tasks. The results are clear-cut and consistent with prior neuropsychological models of the rapidly shifting cortical network accompanying execution, and 'updating' to feedback about response accuracy. These results suggest that it is possible to characterize 'functional interdependencies' of event-related processing between local neural areas by measuring the wave congruence and lag time of appropriately preprocessed low-frequency brain waves. (js)

Descriptors :   *BRAIN, ACCURACY, ELECTRODES, LOW FREQUENCY, MODELS, NERVOUS SYSTEM, NEUROLOGY, PREPROCESSING, PSYCHOLOGY, RESPONSE, SEQUENCES, SIGNAL PROCESSING, TIME LAG THEORY, WAVES.

Subject Categories : Psychology
      Medicine and Medical Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE