Author | dc.contributor.author | Del Cul, Antoine | |
Author | dc.contributor.author | Dehaene, Stanislas | es_CL |
Author | dc.contributor.author | Reyes, P. | es_CL |
Author | dc.contributor.author | Bravo, E. | es_CL |
Author | dc.contributor.author | Slachevsky Chonchol, Andrea | es_CL |
Admission date | dc.date.accessioned | 2010-04-27T20:09:59Z | |
Available date | dc.date.available | 2010-04-27T20:09:59Z | |
Publication date | dc.date.issued | 2007 | |
Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/128502 | |
Abstract | dc.description.abstract | What neural mechanisms support our conscious perception of briefly presented stimuli? Some
theories of conscious access postulate a key role of top-down amplification loops involving
prefrontal cortex (PFC). To test this issue, we measured the visual backward masking
threshold in patients with focal prefrontal lesions, using both objective and subjective
measures while controlling for putative attention deficits. In all conditions of temporal or
spatial attention cueing, the threshold for access to consciousness was systematically shifted
in patients, particular after lesion of left anterior PFC. The deficit affected subjective reports
more than objective performance, and objective performance conditioned on subjective
visibility was essentially normal. We conclude that PFC makes a causal contribution to
conscious visual perception of masked stimuli, and outline a dual-route signal detection
theory of objective and subjective decision making. | en_US |
Patrocinador | dc.description.sponsorship | This work was supported by Fondecyt 1050155 (Chile), INSERM, and CEA. | en_US |
Lenguage | dc.language.iso | en | en_US |
Título | dc.title | Causal role of prefrontal cortex in the threshold for access to consciousness | en_US |
Document type | dc.type | Artículo de revista | |