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Similar cortical correlates underlie visual object identification and orientation judgment.
- Source :
-
Neuropsychologia [Neuropsychologia] 2005; Vol. 43 (14), pp. 2101-8. Date of Electronic Publication: 2005 Apr 20. - Publication Year :
- 2005
-
Abstract
- Visual object perception has been suggested to follow two different routes in the human brain: a ventral, view-invariant occipital-temporal route processes object identity, whereas a dorsal, view-dependent occipital-parietal route processes spatial properties of an object. Using fMRI, we addressed the question whether these routes are exclusively involved in either object recognition or spatial representation. We presented subjects with images of natural objects and involved them either in object identification or object orientation judgment task. For both tasks, we observed activation in ventro-temporal as well as parietal areas bilaterally, with significantly stronger responses for the orientation judgment in both ventro-temporal as well as parietal areas. Our findings suggest that object identification and orientation judgment do not follow strictly separable cortical pathways, but rather involve both the dorsal and the ventral stream.
- Subjects :
- Adult
Brain Mapping
Cerebral Cortex blood supply
Female
Functional Laterality physiology
Humans
Image Processing, Computer-Assisted methods
Magnetic Resonance Imaging methods
Male
Oxygen blood
Photic Stimulation methods
Reaction Time physiology
Time Factors
Cerebral Cortex physiology
Discrimination, Psychological physiology
Judgment physiology
Orientation physiology
Visual Perception physiology
Subjects
Details
- Language :
- English
- ISSN :
- 0028-3932
- Volume :
- 43
- Issue :
- 14
- Database :
- MEDLINE
- Journal :
- Neuropsychologia
- Publication Type :
- Academic Journal
- Accession number :
- 16243054
- Full Text :
- https://doi.org/10.1016/j.neuropsychologia.2005.03.015