| HAL : hal-00016885, version 1 |
| Fiche détaillée | Récupérer au format |
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| Superior Colliculus geometry for spatio-temporal transformation |
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| Nicolas Tabareau 1Benoît Girard 1 |
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| (13/01/2006) |
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| The superior colliculus maps encode the position of targets in retinotopic space using a linear or a logarithmic mapping, depending on the species considered. In turn, the motor map projects to the saccade generators where this spatial code is transformed into a temporal one. We use a set of five hypotheses in accordance with current neurobiological knowledge concerning the spatio-temporal transformation to show that the logarithmic and linear mappings are the only possible ones. Finally, given these mappings, we analytically determine the weights of the projections from the superior colliculus to the saccade generators, and prove that, surprisingly, they depend linearly on the target coordinates in the visual space. |
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| 1 : | Laboratoire de physiologie de la perception et de l'action (LPPA) |
| CNRS : UMR7124 – Collège de France | |
| 2 : | Institut de Mathématiques de Jussieu (IMJ) |
| CNRS : UMR7586 – Université Paris VI - Pierre et Marie Curie – Université Paris VII - Paris Diderot | |
| 3 : | Nonlinear Systems Laboratory (NSL) |
| Massachusetts Institute of Technology | |
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| Domaine | : | Sciences cognitives/Neurosciences |
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| saccades – superior colliculus – spatio-temporal transform |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00016885, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00016885 | |
| oai:hal.archives-ouvertes.fr:hal-00016885 | |
| Contributeur : Benoît Girard | |
| Soumis le : Vendredi 13 Janvier 2006, 12:13:01 | |
| Dernière modification le : Vendredi 13 Janvier 2006, 14:36:35 | |