Brain representation of object-centered space.
Object-centered spatial awareness underlies many important cognitive functions, including reading, which requires registering the locations of letters relative to a word, and pattern recognition, which requires registering the locations of features relative to a whole pattern. Recent studies have elucidated the nature of the brain mechanisms underlying this form of spatial awareness by showing the attention tends to focus on objects rather than on regions of space: by demonstrating that each hemisphere contributes selectively to awareness of the opposite half of object space, and by revealing that neurons in some cortical areas are selective for particular locations in object space. These results are concordant with the general idea that imagining or attending to an object is accompanied by projecting its image onto a neural map of object-centered space. An important aim for future studies will be to test and extend this 'object map' hypothesis.
Olson
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Department of Oral and Craniofacial Biological Sciences, University of Maryland Dental School, Baltimore 21201, USA. colson@umabnet.ab.umd.edu
Gettner
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D001288:Attention / Q000502:physiology; D001921:Brain / Q000166:cytology / Q000502:physiology*; D006801:Humans; D009474:Neurons / Q000502:physiology; D009484:Neuropsychology / Q000379:methods; D013028:Space Perception / Q000502:physiology*