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Brain Physiology, Cognition and Consciousness group: topic
This is a public discussion boardFeatured articles
Hans Peter Jobst Ricke
Wednesday, 09 September 2009 08:14 UTC
We have – since quite a while – posted articles and in order to feature them pinned them so they could catch the attention of all group members, even those who are not visiting the group on a regular basis.
Some of them did not raise many replies, so it does not make sense to have them at the top for months. Then they will possibly appear in the link collection below. In that case, just look them up and “revive” them any time you want.
This thread is going to collect those articles and also have a general discussion about interesting articles that might be worth a thread of their own. Please keep checking this place for new articles.
1. Effects on Cognition by Erythropoietin
2. Models of Consciousness
Updated 08 October 2009 10:39 UTCSome of them did not raise many replies, so it does not make sense to have them at the top for months. Then they will possibly appear in the link collection below. In that case, just look them up and “revive” them any time you want.
This thread is going to collect those articles and also have a general discussion about interesting articles that might be worth a thread of their own. Please keep checking this place for new articles.
1. Effects on Cognition by Erythropoietin
2. Models of Consciousness
Replies
This forum is closed.-
How about this one?
Classical conditioning in the vegetative and minimally conscious state
From the abstract: “Our results suggest that individuals with DOCs might have partially preserved conscious processing, which cannot be mediated by explicit reports and is not detected by behavioral assessment.” -
It is my intention to discuss with you, but it no gives me time to respond in detail(for my job). Excuse me for that and for my lack
poorof dedication.
Thanks for your comprehension.
Alejandro Correa -
Researchers crack part of the neuronal code
Together with colleagues from the Graz University of Technology, scientists from the Max Planck Institute for Brain Research in Frankfurt have succeeded in taking a step towards achieving this. They have shown that early processing stages in the brain gather information over an extended period.
How does the brain store detailed information from sensory stimuli? How much can researchers read from the activity of certain regions of the brain? Current findings confirm a new theory. Up to now, scientists had assumed that the early stages of information processing in the brain took place gradually, that is that one stimulus was processed after another in a conveyor-belt-like sequence. This idea must now be revised. As Danko Nikolic from the Max Planck Institute for Brain Research and his Austrian colleagues Wolfgang Maass and Stefan Häusler have shown, the activity in early brain areas depends on stimuli that arose some time ago. “The brain functions like a jug of water into which stones are thrown and, as a result, generate waves,” explains Nikolic. “The waves overlap but the information as to how many stones were thrown into the jug and when they were thrown in is retained in the resulting complex activity patterns of the fluid.”
The brain is clearly able to render this information usable and, for example, to superimpose images seen in succession. The duration and intensity of the continuing effect of images that have just been seen corresponds to a very detailed visual memory also known as iconic memory. If you see an image and close your eyes immediately afterwards it remains visible for a short while. It may be located in the primary visual cortex.
Original article in Phys.Org
At the risk of belaboring the obvious, the foregoing is in clear accord with my own views regarding superposition, perception and consciousness, where the waves being superposed are photonic waves/state vectors:
Are Perceptual Fields Quantum Fields?
Thus, sensory fields just are superpositions of afferent photons (in seeing, or simple sensation).
Photons contributed by memory, motor, affective and cognitive centers and so forth — these give rise to various levels of perceptual awareness, of seeing as. -
Dear Brian: Many thanks for this notice. It is becoming clear that brain cognitive states operate on “wave computing” and that this computing is different from what digital computers do. I am one of those who hold that wave computing has a quantum foundation, although I also believe that the explanation of macro systems dynamics (as the brain) should take into account complex initial and boundary conditions, as well as supplementary principles.
Best Regards
Alfredo -
Dear Alfredo,
Thanks for your reply. I’m not sure whether the material below got through on my first attempt.
I think we are in accord here with mainstream physics, as given, e.g., on pg 1 of Hawking & Ellis.
It works out very well, I think, this dual picture of waves/vectors, in respect of what we actually perceive. Thus, many people who really ought to know better persist in identifying color with wavelength — Not stopping to think that colors fill areas, whereas a wavelength is, after all, a length, and so fails a very simple dimensional test.
How do vectors help us out, though? Well, vectors are dual to differential forms (PDF), and so we have a nice way of recovering colored areas in a way that would seem perfectly compatible with the traditional tensor representation of EM — and then, the tensor representation should also give us the kinds of symmetries we observe with colors and the other secondary properties.
Shifting gears a bit, we also seem to recover a nice analogy to Hilbert space:
Again, subjecting a photon to the Doppler effect changes its energy (by E = hv) and so the energy operator rotates the photon in Hilbert space and, by a kind of Bohr-like correspondence principle, rotates the color vector as well.
In other news, here’s a fascinating item:
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