[Abstract Title]. - Society for Neuroscience

disappear for cue-chimeric stimuli. We designed such stimuli, combining structure-from-motion
and shaded faces to form cue-chimeric stimuli. We found that although the composite face effect
decreases for cue-chimeric stimuli, it remains significant, suggesting that multiple cues are
integrated prior to recognition mechanisms. In a second experiment, we assessed whether
conflicting global cues give rise to bistable percepts or whether the two cues compete. We found
that the perception of a structure-from-motion face was completely obliterated by the presence of
a phase-locked shaded face. Reducing the overlap between the two facial surfaces allowed both
to be perceived, but without overlap, the shaded face dominated the percept, even at low contrast
and luminance levels. This pattern of result suggests that multiple cues may integrate only if they
relate to a single resolvable surface_as soon as additional surfaces need to be resolved from one
another, surface competition may lead the strongest surface structure to win.
Disclosures: R. Farivar-Mohseni , None; A. Chaudhuri, None.
Poster
260. Objects and Faces in Humans II
Time: Sunday, November 16, 2008, 1:00 pm - 5:00 pm
Program#/Poster#: 260.19/BB31
Topic: D.04.j. Processing of objects and faces
Support: NIH Grant EY015000
NSF Grant BCS-0617688
Klingenstein Fellowship in Neuroscience
NIH Grant 1R21EY017741
Title: Fiber tracts connecting mid-fusiform and lateral occipital face-selective regions
Authors: *J. YOON, G. GOLARAI, M. BEN SHACHAR, R. F. DOUGHERTY, S. HONG, A.
LIBERMAN, K. GRILL-SPECTOR;
Psychology, Stanford Univ., Stanford, CA
Abstract: Introduction: Functional neuroimaging studies of face processing reveal a network of
regions involved in face processing including a region in the fusiform gyrus (FFA), a region in
lateral occipital cortex (OFA) and a region in the posterior STS. Models of face processing
suggest a projection from OFA to the FFA (e.g., Haxby et al, 2000). Lesions to the FFA or the
OFA are sufficient to induce prosopagnosia even when the rest of the network is structurally