期刊
CORTEX
卷 72, 期 -, 页码 15-26出版社
ELSEVIER MASSON, CORP OFF
DOI: 10.1016/j.cortex.2014.11.009
关键词
Mental imagery; Face perception; Cortical blindness; Emotion perception; Visual cortex
资金
- FWO-Vlaanderen [1.5.072.13N]
- project TANGO
- Future and Emerging Technologies (FET) program within the Seventh FramewoProgram for Research of the European Commission, under FET-Open grant [249858]
- European Research Council under the European Union's Seventh Framework Program (FP7)/ERC [295673]
- Swiss National Science Foundation [320030-144187]
- Netherlands Organisation for Scientific Research (NWO) [452-11-015]
- FIRB - Futuro in Ricerca - grant from the Italian Ministry of Education University and Research (MIUR) [RBFR12F0BD]
- Regione Piemonte (bando Scienze Umane e Sociali) [L.R.n.4./2006]
- Swiss National Science Foundation (SNF) [320030_144187] Funding Source: Swiss National Science Foundation (SNF)
Mental imagery is a powerful mechanism that may facilitate visual perception as well as compensate for it. The role of V1 in mental imagery is still a matter of debate. Our goal here was to investigate whether visual imagery was still possible in case of bilateral V1 destruction behaviorally evidenced by total clinical blindness and if so, whether it might boost residual visual perception. In a factorial fMRI design, faces, scenes or scrambled images were presented while a rare patient with cortical blindness over the whole visual field due to bilateral V1-lesions (TN) was instructed to imagine either an angry person or a neutral object (tree). The results show that visual imagery of a person activates frontal, parietal and occipital brain regions similar to control subjects and hence suggest that V1 is not necessary for visual imagery. In addition, the combination of visual stimulation and visual imagery of socio-emotional stimuli triggers activation in superior parietal lobule (SPL) and ventromedial (vmPFC) and dorsolateral prefrontal cortex (DLPFC). Finally, activation during residual vision, visual imagery and their interaction overlapped in the SPL, arguing for a central role of feeling in V1-independent vision and imagery. (C) 2014 Elsevier Ltd. All rights reserved.
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