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JOURNAL ARTICLE

Subregions of human parietal cortex selectively encoding object orientation

Toshihiko Aso, Takashi Hanakawa, Kayako Matsuo, Keiichiro Toma, Hiroshi Shibasaki, Hidenao Fukuyama, Toshiharu Nakai
Neuroscience Letters 2007 March 30, 415 (3): 225-30
17284349
Computation of object orientation could be an independent process from those of other object features, but currently neither the location of human brain areas selectively coding orientation information nor an optimum experimental paradigm have yet been established. In this study, functional magnetic resonance imaging was used to investigate brain activation in the parietal cortices related to object orientation. Using an Arabic digit whose spatial attributes were carefully manipulated, we found parietal areas exclusively sensitive to object orientation, but not to general spatial attention. It seems that, by excluding confounds such as mental manipulation or working memory as well as inherent spatial information within the stimuli, functional segregation within the parietal lobe can be effectively probed.

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