Reference : From coarse to fine? Spatial and temporal dynamics of cortical face processing
Scientific journals : Article
Social & behavioral sciences, psychology : Neurosciences & behavior
Social & behavioral sciences, psychology : Theoretical & cognitive psychology
http://hdl.handle.net/10993/13178
From coarse to fine? Spatial and temporal dynamics of cortical face processing
English
Goffaux, Valerie []
Peters, Judith []
Haubrechts, Julie []
Schiltz, Christine mailto [University of Luxembourg > Faculty of Language and Literature, Humanities, Arts and Education (FLSHASE) > Educational Measurement and Applied Cognitive Science (EMACS) >]
Jansma, Bernadette []
Goebel, Rainer []
Jan-2011
Cerebral Cortex
Oxford University Press
21
2
467-476
Yes (verified by ORBilu)
1047-3211
1460-2199
Cary
NC
[en] coarse-to-fine ; exposure duration ; face perception ; fMRI ; spatial frequency
[en] Primary vision segregates information along 2 main dimensions: orientation and spatial frequency (SF). An important question is how this primary visual information is integrated to support high level representations. It is generally assumed that the information carried by different SF is combined following a coarse-to-fine sequence. We directly addressed this assumption by investigating how the network of face-preferring cortical regions processes distinct SF over time. Face stimuli were flashed during 75, 150, or 300 ms and masked. They were filtered to preserve low SF (LSF), middle SF (MSF), or high SF (HSF). Most face-preferring regions robustly responded to coarse LSF, face information in early stages of visual processing (i.e., until 75 ms of exposure duration). LSF processing decayed as a function of exposure duration (mostly until 150 ms). In contrast, the processing of fine HSF, face information became more robust over time in the bilateral fusiform face regions and in the right occipital face area. The present evidence suggests the coarse-to-fine strategy as a plausible modus operandi in high level visual cortex.
http://hdl.handle.net/10993/13178
10.1093/cercor/bhq112

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