TY - JOUR

T1 - Effects of Repetition and Stimulus Mismatch in Sensory Visual Components of Event-related Potentials

AU - Kropotov, Yu D.

AU - Ponomarev, V. A.

AU - Pronina, M. V.

AU - Polyakova, N. V.

PY - 2019/7/1

Y1 - 2019/7/1

N2 - Abstract: Three modifications of the paradigm of visual stimulus-to-sample comparison were used to study mental operations under the conditions of sensory repetition and mismatch. Ninety-seven healthy adult subjects took part in the studies, where event-related potentials (ERPs) were recorded and analyzed in 31 channels in the current source density (CSD) montage. It is has been shown that the repetition of stimuli in an active, response-demanding test construction induces the N250 component localized in posterior temporal derivations (T5, T6) and associated presumably with synaptic habituation. On the contrary, a mismatch in physical characteristics of a stimulus induces the positive component P2 localized in the same derivations and presumably associated with a recurrent income of information from higher to lower cortical areas. Similar correlates of repetition/mismatch are also observed in a passive, not response-requiring test construction, but the amplitude of the components in the passive construction was lower.

AB - Abstract: Three modifications of the paradigm of visual stimulus-to-sample comparison were used to study mental operations under the conditions of sensory repetition and mismatch. Ninety-seven healthy adult subjects took part in the studies, where event-related potentials (ERPs) were recorded and analyzed in 31 channels in the current source density (CSD) montage. It is has been shown that the repetition of stimuli in an active, response-demanding test construction induces the N250 component localized in posterior temporal derivations (T5, T6) and associated presumably with synaptic habituation. On the contrary, a mismatch in physical characteristics of a stimulus induces the positive component P2 localized in the same derivations and presumably associated with a recurrent income of information from higher to lower cortical areas. Similar correlates of repetition/mismatch are also observed in a passive, not response-requiring test construction, but the amplitude of the components in the passive construction was lower.

KW - event-related potentials (ERPs)

KW - match/mismatch operations

KW - N250 and P2 components

KW - paradigm of comparison with sample

UR - http://www.scopus.com/inward/record.url?scp=85071758133&partnerID=8YFLogxK

U2 - 10.1134/S0362119719040066

DO - 10.1134/S0362119719040066

M3 - Article

AN - SCOPUS:85071758133

VL - 45

SP - 349

EP - 355

JO - Human Physiology

JF - Human Physiology

SN - 0362-1197

IS - 4

ER -