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Active sensation and binocular integration| old_uid | 16044 |
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| title | Active sensation and binocular integration |
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| start_date | 2018/06/04 |
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| schedule | 11h |
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| online | no |
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| summary | Rodents have become increasingly popular to study neuronal circuitry as genetic tools are available to manipulate those circuits. Although rodents have visual cortical circuitry in common with other mammals, little is known about their use of visual signals to guide behavior. Mice do not have a fovea like many predators and non-human primates. This raises the question of why do mice make saccadic eye movements, since the primary function of saccades is thought to be foveation of a salient region of interest in a scene. We find that mice share some saccade properties with humans: saccades increase in size and frequency when subjects are viewing larger images. I will present evidence that another function of saccades is to decorrelate incoming visual information so that neurons are continually sampling non-redundant information. We have characterized decorrelation distances in natural images for a wide range of receptive field sizes and find that this can be used to predict saccade size distributions for a wide range of species, including non-human primates, cats, and mice. Therefore, natural scene statistics and the neural representation of scenes are critical factors in guiding saccadic eye movements. We have also begun to utilize a behavioural paradigm that demonstrates mice can use binocular information for visually-guided behaviour, and that activity in primary visual cortex (V1) is critical for this behaviour. |
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| responsibles | Blancho |
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