A Simple Mechanism to Reproduce the Neural Solution of the Aperture Problem in Monkey Area MT [ RR-6579]

Maria-Jose Escobar 1 Guillaume S. Masson 2 Pierre Kornprobst 1
1 ODYSSEE - Computer and biological vision
DI-ENS - Département d'informatique de l'École normale supérieure, CRISAM - Inria Sophia Antipolis - Méditerranée , ENS Paris - École normale supérieure - Paris, Inria Paris-Rocquencourt, ENPC - École des Ponts ParisTech
Abstract : We propose a simple mechanism to reproduce the neural solution of the aperture problem in monkey area MT. More precisely, our goal is to propose a model able to reproduce the dynamical change of the preferred direction (PD) of a MT cell depending on the motion information contained in the input stimulus. The PD of a MT cell measured through drifting gratings differs of the one measured using a barberpole, which is highly related with its aspect ratio. For a barberpole, the PD evolves from the perpendicular direction of the drifting grating to a PD shifted according to the aspect ratio of the barberpole. The mechanisms underlying this dynamic are unknown (lateral connections, surround suppression, feed-backs from higher layers). Here, we show that a simple mechanism such as surround-inhibition in V1 neurons can produce a significant shift in the PD of MT neurons as observed with barberpoles of different aspect ratios
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[Research Report] RR-6579, INRIA. 2008
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Maria-Jose Escobar, Guillaume S. Masson, Pierre Kornprobst. A Simple Mechanism to Reproduce the Neural Solution of the Aperture Problem in Monkey Area MT [ RR-6579]. [Research Report] RR-6579, INRIA. 2008. 〈inria-00290759v2〉



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