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Well for one, the first neurons to decode this symbol are orientation neurons, in V1 of the primary visual cortex. So some neurons have enhanced firing for say a 45 degree angle, and neighboring neurons for a 46 degree angle, and so on. Higher up the processing stream groups of neurons respond to shapes, that are a conglomerate of the orientation lines. Then ...


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Basically, the retina contains two different kinds of receptors: rods and cones. Cones are concentrated in the fovea and activate ganglion cells more discretely than rods. Rods are more interconnected by horizontal cells (if I'm not mistaken...), so multiple rods can often activate the same ganglion cell, whereas each cone is more likely to have its own ...


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Are you trying to measure something specific to the stimulus you are presenting or is it just a matter of displaying text on a screen where what you are measuring is unrelated to the text per se? For instance, experiments I run depend on the stimulus presentation. We are targeting a certain visual pathway, so for example one stimulus is red/green and high ...



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