Theta oscillation related to the auditory discrimination process in mismatch negativity: oddball versus control paradigm.

ABSTRACT:

Background and purpose

The aim of this study was to identify the mechanism underlying the auditory discriminatory process reflected in mismatch negativity (MMN), using time-frequency analysis of single-trial event-related potentials (ERPs).

Methods

Two auditory tones of different probabilities (oddball paradigm) and the same probability (control paradigm) were used. The average dynamic changes in amplitude were evaluated, and the in-phase consistency of the EEG spectrum at each frequency and time window across trials, event-related spectral perturbations (ERSPs), and inter-trial phase coherence (ITC) were computed.

Results

Subtraction of the ERPs of standard stimuli from the ERPs of deviant stimuli revealed a clear MMN component in the oddball paradigm. However, no di

SUBMITTER: Ko D 

PROVIDER: S-EPMC3325430 | biostudies-literature | 2012 Mar

REPOSITORIES: biostudies-literature