| Presentation | 2005/10/10 TTC estimation of ball catching task in various acceleration environment Yasuharu KOIKE, SungKwan HONG, Makoto SATO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | When we catch a falling ball, we assume by habit the gravitational acceleration which prevails on earth. But can we catch a falling ball correctly, if the gravitational acceleration is different? This research examines whether different acceleration can be learned and switched for catching a falling ball task. In the experiments, we showed a virtual ball moving vertically downward on a 50 inch plasma display with four different accelerations from 5.8m/s^2 to 11.8m/s^2. The acceleration was selected randomly. The ball catching was simulated by a force-feedback system, provided by the SPIDAR. The subject was asked to catch the virtual ball at an initial hand position. The hand position and Electromyographic (EMG) activity of flexor carpi radialis were recorded. At the beginning, subjects caught the ball at the same timing as gravitational acceleration for all acceleration. The subjects came to receive the ball of any acceleration gradually as training advanced by force feedback. We found that subjects learned new environments in which the ball was falling by a different acceleration and also switched each environment by only visual information. These results suggest that humans can visually discriminate different accelerations. On one hand, when humans can estimate the acceleration precisely, this detailed information will be used to calculate the Time To Contact (TTC). On the other hand, humans can use multiple internal models for different accelerations, and they estimate the TTC by switching the internal model without estimating the quantitative acceleration. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | caching / acceleration / motor learning / timing estimation |
| Paper # | NC2005-41 |
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| Committee | NC |
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| Conference Date | 2005/10/10(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Neurocomputing (NC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | TTC estimation of ball catching task in various acceleration environment |
| Sub Title (in English) | |
| Keyword(1) | caching |
| Keyword(2) | acceleration |
| Keyword(3) | motor learning |
| Keyword(4) | timing estimation |
| 1st Author's Name | Yasuharu KOIKE |
| 1st Author's Affiliation | JST CREST:Tokyo Institute of Technology P&I Laboratory() |
| 2nd Author's Name | SungKwan HONG |
| 2nd Author's Affiliation | JST CREST:Tokyo Institute of Technology P&I Laboratory |
| 3rd Author's Name | Makoto SATO |
| 3rd Author's Affiliation | Tokyo Institute of Technology P&I Laboratory |
| Date | 2005/10/10 |
| Paper # | NC2005-41 |
| Volume (vol) | vol.105 |
| Number (no) | 341 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |