| Presentation | 2009-07-13 Neural representation of observed action in parieto-premotor cortex : an fMRI study with multi-voxel pattern analysis Kenji OGAWA, Toshio INUI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Previous research indicates that posterior parietal cortex (PPC) and ventral premotor area (PMv) has a role in understanding of other's action. However, action selectivity that is critical for action understanding within these regions has not been elucidated. We investigated whether the parieto-premotor cortex contains information about observed actions using multi-voxel pattern analysis (MVPA) over fMRI data. Participants observed object-directed hand actions. We independently manipulated multiple dimensions of observed images: action (grasp/touch), object (cup/bottle), perspective (egocentric/allocentric), hand (right/left), and image size (large/small). Neural representation of observed actions was investigated by analyzing whether this information could be correctly decoded from multi-voxel pattern activity. Results showed that the early visual area showed significant above-chance classification accuracy in all dimensions, with particularly high accuracy in perspective, hand, and image size, which is consistent with pixel-wise dissimilarity of input images. In contrast, significant decoding accuracy was observed for action, mirror-image of hand, and object in the anterior intraparietal sulcus (aIPS), and for action and object in the PMv. Our study indicates that the parieto-premotor cortex processes observed actions in a hierarchical manner, where the aIPS represents action together with hand and object, and the PMv encodes more abstracted representations of observed action. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | fMRI / multi-voxel pattern analysis / action observation / posterior parietal cortex / premotor cortex |
| Paper # | NLP2009-24,NC2009-17 |
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| Conference Information | |
| Committee | NLP |
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| Conference Date | 2009/7/6(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Registration To | Nonlinear Problems (NLP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Neural representation of observed action in parieto-premotor cortex : an fMRI study with multi-voxel pattern analysis |
| Sub Title (in English) | |
| Keyword(1) | fMRI |
| Keyword(2) | multi-voxel pattern analysis |
| Keyword(3) | action observation |
| Keyword(4) | posterior parietal cortex |
| Keyword(5) | premotor cortex |
| 1st Author's Name | Kenji OGAWA |
| 1st Author's Affiliation | Asada project, ERATO, Japan Science and Technology Agency() |
| 2nd Author's Name | Toshio INUI |
| 2nd Author's Affiliation | Asada project, ERATO, Japan Science and Technology Agency:Graduate School of Informatics, Kyoto University |
| Date | 2009-07-13 |
| Paper # | NLP2009-24,NC2009-17 |
| Volume (vol) | vol.109 |
| Number (no) | 124 |
| Page | pp.pp.- |
| #Pages | 6 |
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