Localization of current dipolar sources during concentration on a quadruplicate tone oddball paradigm

The early components of the auditory event-related field (AEF) are elicited by synchronous cum1 in one direction at a group of neurons in response to a presented stimulus. When a stimulus attracting attention belongs to a novel category, the slow responsecaUedP300iselicitedfromthelatencyof 250msec to 450msec[1]. Many authors have repotted that the P300 generator probably exists in the limbic system. making it doubtful whether P300 represents activity in the auditory cortex even if it can be measured after an auditory stimulus [2]-[4].