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Somatotopic distortion of tactile temporal interval estimation
Shinobu Kuroki,Junji Watanabe,Naoki Kawakami,Susumu Tachi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Tactile timing mechanism, which is essential for an accurate response to the external environment, has to com-pensate for the distortions of neural timing signals specifically, signals that comefrom distributed peripheral receptors and body parts, which move dynamically in space. Since an accurate visual timing encoding lack sprecision when two widely separated photo recept or sareused, we studied how tactile timing is encoded in relation to two distances-somatotopic rep-resentation, defined by cortical topography, and spatiotopic representation, defined in the physical world. We conducted one-second tactile-interval estimation experiments in which the spatial distances of the two stimuli were system atically manipulated in somatotopic and spatiotopic representations, and then, we compared the two. Our results showed that somatotopic nerve distance-and not real-world physical distance-plays a dominant role in tactile timing estimations.