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There is no such thing as "zero" activity in regards to brain circuits. Even when you record neurons from a brain slice in vitro, you have spontaneous network activity. There is a few studies that suggest that brain circuits are chaotic, where infinitesimal difference in the initial state will lead to exponentially diverging patterns of activity: ...


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Short answer On the basis of a cursory literature review, I conclude that Jospeh's observations were correct, but his conclusions that a callosotomy can result in a dual consciousness were far stretched. Background First off, I'm not an expert on this topic, but I will give my referenced opinion anyway, as there is no answer yet to this question; Below are ...


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Based on computational models of resting brain activity, it can be assumed that the brain is a multistable dynamical systems that operates on the edge of a "critical" bifurcation point seperating a low firing spontaneous state (which can be seen as more or less random low firing activity) from a state of high frequency activity. see for example the work ...


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Assuming you are talking about the ability of the visual system to resolve spatial detail (resolution, if you wish), then your question is on visual acuity as a function of eccentricity on the retina (Fig. 1). Due to the densely packed cones at the fovea (corresponding to the central field of view (FOV), see Fig. 1), visual acuity (VA) is the greatest at ...


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In a recent study, brain scans revealed that people under the influence of LSD experience images through information drawn from many parts of their brains, and not just the visual cortex at the back of the head that normally processes visual information. While under influence, regions normally segregated spoke to one another. Further images showed that other ...


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I wanted to make a few additions to Christiaan's answer. First of all, the functional location's as described by Brodmann (wiki) is a little outdated. Nowadays, it is believed that there are networks of regions that are responsible for a particular function. An example is the default mode network, a network of the ACC and prefrontal regions, that is ...


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Joseph's description of his patients fascinated me. The concept of two minds fighting for control isn't a new one to me, but was previously restricted to science fiction and/or horror genres. How strange to find a real-life example of it. What I find unsatisfying about the explanation of "reduced inhibitory control of the dominant hemisphere over the ...



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