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Hasson U, Hendler T, Bashat DB, Malach R.

Vase or Face? A Neural Correlate of Shape-Selective Grouping Processes in the Human Brain

fMRIDC Accession Number: 2-2001-111P8
Journal of Cognitive Neuroscience 2001 Aug ;13(6): p.744-753
View entire article (off-site link)
PubMed ID: 11564319 (off-site link)

Study Meta-Data

Recent neuroimaging studies have described a differential activation pattern associated with specific object-images (e.g. face-related and building-related activation) in human occipito-temporal cortex. However, it is as yet unclear to what extent this selectivity is due to differences in the statistics of local object features present in the different object categories, and to what extent it reflects holistic grouping processes operating across the entire object image. To resolve this question it is essential to use images in which identical sets of local features elicit the perception of different object categories. The classic Rubin vase-face illusion provides an excellent experimental set to test this question. In the illusion, the same local contours lead to the perception of different objects (vase or face). Here we employed a modified Rubin vase-face illusion to explore to what extent the activation in face-related regions is attributable to the presence of local face-features, or is due to a more holistic grouping process that involves the entire face figure. Biasing cues (gratings and color) were used to control the perceptual state of the observer. We found enhanced activation in face-related regions during the eface-profiled perceptual state compared to the evased perceptual state. Control images ruled out the involvement of the biasing cues in the effect. Thus, object-selective activation in human face- related regions entails global grouping processes that go beyond the local processing of stimulus features. |

Supplemental Information

Language: English
fMRIDC Comments: Shape-selective processing Dataset Size: 981M Available on 2 CDs
Country: Israel
Magnetic Field Strength: 1.5T
Scanner Manufacturer: GE Signa Horizon Echospeed LX
Analysis Software: Brain Voyager 4.01
Cognitive Domain: Vision
Subjects: 16 (2 groups), 1 discarded
Age Range: ???????
Functional Runs: 1
Has anatomical data
Has raw image data
Has high-res images

Comments on Vase or Face? A Neural Correlate of Shape-Selective Grouping Processes in the Human Brain by interch on June 29, 2010 @12:59

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