Oscillatory characteristics of the visual mismatch negativity: what evoked potentials aren't telling us.

ABSTRACT: The visual mismatch negativity (vMMN) response is typically examined by subtracting the average response to a deviant stimulus from the response to the standard. This approach, however, can omit a critical element of the neural response, i.e., the non-phase-locked ("induced") oscillatory activity. Recent investigations of the oscillatory characteristics of the auditory mismatch negativity (aMMN) identified a crucial role for theta phase locking and power. Oscillatory characteristics of the vMMN from 39 healthy young adults were investigated in order to establish whether theta phase locking plays a similar role in the vMMN response. We explored changes in phase locking, overall post-stimulus spectral power as well as non-phase-locked spectral power compared to baseline (-300 to 0 ms). These

SUBMITTER: Stothart G 

PROVIDER: S-EPMC3729976 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature