Temporal Variability of the Neuromagnetic Evoked Field: Implications for Human Performance Assessment. (Reannouncement with New Availability Information).

摘要

One major asset of magnetencephalography (MG) and resulting signal averaged neuromagnetic evoked fields (EF) is that of determining field maps and localizing neural source generators. Averaging of many single epochs, most often required for such localization, maximizes signal strength, but minimizes signal changes or variability. An area of research of considerable interest to us is that of assessing short term temporal changes in brain processing and their possible relationships to individual differences and job performance. There appears to be a direct relationship between neuroelectric evoked potential (EP) variability and on-job performance. This paper will report that substantial decrease in the TTV (trial-to-trial variability) and the EF occurred relatively early during a 10-minute recording period, and that groups of high- and low-performing individuals differed in the size and time course of these changes.