2010 Fiscal Year Final Research Report
Mechanisms for hand manipulation based on multisensory information
| Project/Area Number |
21700234
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Sensitivity informatics/Soft computing
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2010
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| Keywords | 感性認知科学 |
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| Research Abstract |
The purpose of the present study was to clarify the mechanisms for hand manipulation based on the dynamics of visuo-somatosensory information. Observers saw a virtual hand created by a computer graphics, and the virtual hand moved synchronously with the observer's hidden real hand. We measured a visual motion aftereffect in this situation. As a result, we found that the magnitude of the visual motion aftereffect enhances when the observers feel as if the virtual hand is their own hand. This result suggests that the sense of ownership of a seen hand is closely related to the visual motion mechanism. Recent monkey neurophysiological studies propose that there exists the spatial vision system that is represented in body-part-centered coordinates. Our human psychophysical results support this hypothesis. Furthermore, we investigated how visual information coordinates with somatosensory information during walking. We found that the brain uses optic flow, not visual egocentric direction, to avoid an obstacle during walking. This experiment provides a new way to separate visual cues for the control of locomotion during obstacle avoidance.
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