Dissociable mechanisms supporting awareness: the P300 and gamma in a linguistic attentional blink task.

ABSTRACT: As demonstrated by the attentional blink (AB) phenomenon, awareness for attended stimuli is governed by sharp capacity limits. We used a linguistic AB task to investigate the neural mechanisms that underlie failures of awareness, examining both event-related potentials and oscillatory brain activity to correctly reported and missed second targets (T2s) presented after a correctly reported first target (T1) in a rapid visual stream of distractors. Correctly reported targets occurring at a short lag (250 ms) after T1-within the classic AB period-elicited enhanced late gamma activity relative to incorrectly reported targets but showed no P300 modulation relative to missed targets. In contrast, correctly reported targets presented at a long lag (830 ms)-outside the classic AB period-elicited a

SUBMITTER: Batterink L 

PROVIDER: S-EPMC3491763 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature