| Presentation | 2006-03-17 On-line visuomotor control mechanism from the viewpoint of coordinate transformation Naoki SAIJO, Hiroaki GOMI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | When the visual target is suddenly shifted during a reaching movement, we can adjust our hand movement to the shifted target position with short-latency (< 150ms). However, the computational mechanism to generate such on-line reaching adjustment is still unclear. In this study we investigated this mechanism from the viewpoint of visuomotor coordinate transformation. We observed the hand response to the target shift in one of eight radial directions. The experimental data show that the direction of the initial phase (150-200ms) of hand response acceleration was slightly biased from the corresponding target shift direction, whereas the direction of the late phase (250-300ms) was little biased. Additionally, when the reaching target shift was introduced by the stimulus without object motion, the response latency was significantly delayed and the directionally biased response was disappeared. These results suggest that the on-line reaching adjustment would be generated by two different mechanisms: a reflexive controller which is induced by visual motion with short-latency and generates spatially inaccurate response, and a voluntary controller which generates spatially accurate response with long-latency. We suggest that the reflexive reaching adjustment would be acted to generate the fast and accurate on-line reaching adjustment for the sudden target shift. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Motor control / Reaching / Visuomotor coordination / On-line / Reflex |
| Paper # | NC2005-151 |
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| Committee | NC |
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| Conference Date | 2006/3/10(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) | On-line visuomotor control mechanism from the viewpoint of coordinate transformation |
| Sub Title (in English) | |
| Keyword(1) | Motor control |
| Keyword(2) | Reaching |
| Keyword(3) | Visuomotor coordination |
| Keyword(4) | On-line |
| Keyword(5) | Reflex |
| 1st Author's Name | Naoki SAIJO |
| 1st Author's Affiliation | NTT Communication Science Labs() |
| 2nd Author's Name | Hiroaki GOMI |
| 2nd Author's Affiliation | NTT Communication Science Labs:Japan Science and Technology Agency, ERATO Shimojo Implicit Brain Function Project |
| Date | 2006-03-17 |
| Paper # | NC2005-151 |
| Volume (vol) | vol.105 |
| Number (no) | 659 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |