A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Neural correlates of late positivities associated with infrequent visual events and response errors
Tekijät: Helenius P., Laasonen M., Hokkanen L., Paetau R., Niemivirta M.
Kustantaja: ACADEMIC PRESS INC ELSEVIER SCIENCE
Julkaisuvuosi: 2010
Lehti: NeuroImage
Tietokannassa oleva lehden nimi: NEUROIMAGE
Lehden akronyymi: NEUROIMAGE
Vuosikerta: 53
Numero: 2
Aloitussivu: 619
Lopetussivu: 628
Sivujen määrä: 10
ISSN: 1053-8119
DOI: https://doi.org/10.1016/j.neuroimage.2010.06.059
Tiivistelmä
The P3 response has been one of the most extensively studied event-related potential (ERP) components Still. the exact functional role and cortical basis of P3 has remained unsettled To explore the cortical processes underlying the generation of late positivines, we recorded the activation evoked by frequent Go and infrequent NoGo stimuli and correct versus erroneous responses using combined magnetoencephalography (MEG) and ERP measurements during a visual Go/NoGo task. The stimulus-locked signals in the ERP channels revealed an enhanced negative N2 and a prominent late positive component (LPC) after the complex NoGo stimuli associated with successfully withheld responses The response-locked ERP signals revealed error-related negativity (ERN) and positivity (Pe) after erroneous responses The positive LPC and Pe components were coupled with functionally and temporally comparable MEG signals This MEG activation detected during the positive components was localized bilaterally in the posterior temporal cortex In the response-locked averages. the temporal activity was enhanced around 200 ms after a commission of an error In the stimulus-locked averages, the activation was also enhanced after infrequent NoGo stimuli around 500 ms after stimulus onset and delayed about 80 ms for the initially miscategonzed NoGo stimuli accompanied by erroneous response. The results suggest that the cortical correlates of Pe are not specifically related to commission of an error. but both the LPC and Pe components, and bilateral temporal cortices. are mole generally involved in stimulus-driven attentional processing evoked by unexpected stimuli The negative ERP components evoked by NoGo stimuli (N2) and erroneous responses (ERN) were found to be associated with partly non-overlapping neural sources (C) 2010 Elsevier Inc. All rights reserved
The P3 response has been one of the most extensively studied event-related potential (ERP) components Still. the exact functional role and cortical basis of P3 has remained unsettled To explore the cortical processes underlying the generation of late positivines, we recorded the activation evoked by frequent Go and infrequent NoGo stimuli and correct versus erroneous responses using combined magnetoencephalography (MEG) and ERP measurements during a visual Go/NoGo task. The stimulus-locked signals in the ERP channels revealed an enhanced negative N2 and a prominent late positive component (LPC) after the complex NoGo stimuli associated with successfully withheld responses The response-locked ERP signals revealed error-related negativity (ERN) and positivity (Pe) after erroneous responses The positive LPC and Pe components were coupled with functionally and temporally comparable MEG signals This MEG activation detected during the positive components was localized bilaterally in the posterior temporal cortex In the response-locked averages. the temporal activity was enhanced around 200 ms after a commission of an error In the stimulus-locked averages, the activation was also enhanced after infrequent NoGo stimuli around 500 ms after stimulus onset and delayed about 80 ms for the initially miscategonzed NoGo stimuli accompanied by erroneous response. The results suggest that the cortical correlates of Pe are not specifically related to commission of an error. but both the LPC and Pe components, and bilateral temporal cortices. are mole generally involved in stimulus-driven attentional processing evoked by unexpected stimuli The negative ERP components evoked by NoGo stimuli (N2) and erroneous responses (ERN) were found to be associated with partly non-overlapping neural sources (C) 2010 Elsevier Inc. All rights reserved
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