Collins, Nobel Prize, Johns Hopkins University discussed on Brain Science with Ginger Campbell, MD: Neuroscience for Everyone


But the complex require the bar to be moving and moving at right angles to the RN tation of the bar, then we get the more calm. Inflec- cells, we call him specialize complex, so and I'm blessing over lots and lots of detail, but we get the specialized complex, which then have requirement for movement only in it's the civic direction. What we call directionally selective? So so that we see a hierarchy of so when we get to the one spreading out from the input layers from lateral genetic Hewlett nucleus in both upward and downward direction. So we go from centers around so that come in. So that have receptive field or accent than have receptive feel centers, surround them to neurons which have the orientations, but. Requirement the simple cells, and then we go from there to the complex so that have requirement or anticipation of bar or edge has to be moving to even more complex. So where the bar has to be moving. But only in a specific direction are all those still in the one. Or are you talking about other areas? I'm talking only about the one right now only about the one. And it's in the one that we also see for the first time information from the two is coming together. Both and I obviously the information between the do I get separate, but it's also kept separate in the lateral genetic Hewlett nucleus. And then the information from the two is is combined an area the one, but we find an area of anyone. So that respond primarily just one I or the other other cells that respond. Equally to both is the bulk of the cells will respond better to one item in the other. We call that ocular dominance. Now, what is important about information coming from both is well, this is the basis for seeing things in depth, and you choir both is to do that. So for example, if you simply oppose your two index fingers close one eye separate the fingers, keep your head steady. Now, try to oppose the two fingers more often than not you'll miss very significantly doing that. Whereas you have both eyes open. You can do it easily. That's depth perception all of that going on right in area v one. So we have a hierarchy of cells. What we do. Also is we have hierarchy in terms of ocular dominance how equally. Cell is driven by both is and so on and so forth. And so what we have in the courts exit been modules. They're called, hyper Collins in which we have all the machinery necessary to analyze a bit of visual space. So we find that needs module all across the visual cortex telling us, then about what is going on in particular part of visual space, you with me still, okay because it's getting complicated. But it's all there in area the one so one of the great features of and this was a wonderful work carried out by two physicians initially at Johns Hopkins University and then at Harvard Medical School, Torsten weasel and David Hubel. And for this word big won the Nobel prize in the early eighties. It was spectacular work. And it really showed for the first time. How we begin to Anna? Allies sensory information coming in and the general principle is that you begin to take pieces if you will of the visual image and co those pieces in various neurons sort of an distraction process, if you will at least, that's the way I think of it in the further along the visual system, you go..

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