Talk:Retinotopy

Neuroscience Mid‑importance

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Anatomy: Neuroanatomy Mid‑importance

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Physiology Mid‑importance

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Untitled

So in a retinotopic map, different neurons correspond to different points on the retina, so for example there may be a fixed ODP pattern and you can identify which neurons correspond to fovea or blind spot, right?

But is there another kind of map, that corresponds to the visual field in a way that subtracts out the motion of the eye? Clearly, the eye is constantly saccading around, and yet we perceive a much more stable visual field (we nearly have to turn our necks to make the visual field seem to scroll, it feels like we can even consciously move our eyes to look around without changing where the borders of our visual field are; that is), apparently fixed to the motion of the head rather than the eye. Does such a map exist at any layer in the brain?

I'm suspicious the answer is no, simply because I imagine that it is not the kind of transformation that neurons are well-suited to performing. (I imagine it would be more feasible to communicate to every neuron in some layer a signal representing the position displacement offset due solely to the eye?) In that case, is there a virtual implementation of such an (eye-motion subtracting visual field) map somewhere in the brain? Or not? (I'm not entirely sure of the extent of our basic ability to detect peculiar motion in synchronisation with eye movement, for example, perhaps the stable visual field is an illusion or at least doesn't correspond to a map in the brain, and instead the brain might encode this information in a form more akin to attaching coordinate values to each object in a list. Also, could ask similar questions about all-sky maps locked to the cardinal directions and subtracting out any turning by the individual, or even 3D maps..) What does retinotopy stand in alternative to? Cesiumfrog (talk) 03:48, 19 September 2011 (UTC)[reply]

The illustration makes no sense

the retinotropic illustration makes no sense, what do the colors mean, what is the relationship between. A and B, why are the combined in the last panel, how does the last panel show the mapping? 65.29.166.232 (talk) 22:14, 1 April 2024 (UTC)[reply]