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Cerebral Cortex Advance Access originally published online on September 22, 2006
Cerebral Cortex 2007 17(7):1680-1693; doi:10.1093/cercor/bhl079
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© The Author 2006. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

Differential Parahippocampal and Retrosplenial Involvement in Three Types of Visual Scene Recognition

Russell A. Epstein and J. Stephen Higgins

Department of Psychology and Center for Cognitive Neuroscience, University of Pennsylvania, PA, USA

Address correspondence to Russell Epstein, Department of Psychology, 3720 Walnut St, Philadelphia, PA 19104-6241, USA. Email: epstein{at}psych.upenn.edu.

Human observers can quickly and accurately interpret the meaning of complex visual scenes. The neural mechanisms underlying this ability are largely unexplored. We used functional magnetic resonance imaging to measure cortical activity while subjects identified briefly presented scenes as specific familiar locations ("Houston Hall"), general place categories ("kitchen"), or general situational categories ("party"). Scene-responsive voxels in the parahippocampal place area (PPA) and retrosplenial cortex (RSC) were highly sensitive to recognition level when identifying scenes, responding more strongly during location identification than during place category or situation identification. In contrast, the superior temporal sulcus, cingulate sulcus, and supermarginal gyrus displayed the opposite pattern, responding more strongly during place category and situation identification. Consideration of results from 4 experiments suggests that the PPA represents the visuospatial structure of individual scenes, whereas RSC supports processes that allow scenes to be localized within a larger extended environment. These results suggest that different scene identification tasks tap distinct cortical networks. In particular, we hypothesize that the PPA and RSC are critically involved in the identification of specific locations but play a less central role in other scene recognition tasks.

Key Words: fMRI • object recognition • parahippocampal place area • place recognition • spatial memory • visual system


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[Abstract] [Full Text] [PDF]


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