qft-algebraic]. "Observables and fields" in Deser, Grisaru & Pendleton 71, [>obs].; w H Narnhofer & U Stein "On quantum field theory in gravitational background" CMP 94 () [>qft-cst; *]. "Fundamental irreversibility and the concept of events" CMP () ">
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Some people who suffer from this condition as children are cured thanks to prompt treatment. Remarkably, in some cases, these post-hydrocephalics turn out to have grossly abnormal brain structure: Even more remarkably, in some cases, these people have normal intelligence and display no obvious symptoms, despite their brains being mostly water.
The black spaces are nothing but fluid: This phenomenon was first noted by a British pediatrician called John Lorber.
Lorber never published his observations in a scientific journal, although a documentary was made about them. There have been a number of other more recent published cases.
Forsdyke argues that such cases pose a problem for mainstream neuroscience. What appears to be missing is the white matterthe nerve tracts that connect the various parts of the cerebral cortex with each other, and with the other areas of the brain. However, some white matter is still visible as the pale grey layer that borders the holes.
The big question is whether this layer of white matter is sufficient to connect up the grey matter and allow it to function normally.
I wonder also if the white matter might be denser than normal i. No-one seems to have looked at this possibility directly; while there have been brain scanning studies of these adult post-hydrocephalics, no detailed post-mortem studies of their brain tissue have been published, as far as I know.
For more on the neuroanatomy of this issue, see John Hawks discussed by Forsdyke. It may be that much of our white matter is redundant, which would be interesting, but not on a metaphysical level.
Thanks to Rolf Degen for letting me know about this paper. It would be astonishing if structures like the thalamus and striatum were absent entirely. None of the published descriptions of these extreme cases seem to go into much anatomical detail.
Not that I could find. Lana The fact that you never see the inverse — tiny ball of brain floating in liquid — also seems to suggest that to function properly, brain area is more important than volume.
Not saying that the bulk of white matter is just stuffing to maintain the right proportion of adjacent and not adjacent surfaces but… well, why not. The Neuro Times I think it depends on what the cherished assumptions really are….
A great deal of our functioning is autonomic and reflexive. Brain tumors do not necessarily impact brain function until they do. Likewise, many diseases not localized in the brain bring with them diminished cognitive capacity without any evident direct impact on higher nervous system operation.
It is probably in that inversion whence cognitive states arise. The idea that more is better than less probably tells us more about human — i. Rex Jung From a neuropsychological perspective, if bad things happen very slowly, the brain can, and often does accommodate with few obvious behavioral deficits.
You can pick up deficits from detailed neuropsychological testing, as I am certain that you would find in testing these individuals. I have seen many patients with hydrocephalus in clinic and this is not something that is associated with no cognitive deficit i.
The rare cases of congenital hydrocephalus, as these cases appear to be, would be interesting to study regarding slow, steady, reorganization of brain structure-function relationships.Curriculum Vitae.
LISA RANDALL. Harvard University—Department of Physics. 17 Oxford Street, Cambridge, MA , USA. [email protected] () Awards and Memberships | External Advisory Positions | Editorial Positions | Named Physics Lectures | Recent and Highly Cited Papers | Books | Contributed Chapters | Contributed Articles and Blog Posts | Opera: CD Recording | .
This article focuses on the 50 most influential scientists alive today and their profound contributions to science. These are scientists who have invented the Internet and fiber optics, challenged AIDS and cancer, developed new drugs, and in general made crucial advances in medicine, genetics, astronomy, ecology, physics, and computer programming.
Jul 26, · According to British biochemist Donald R. Forsdyke in a new paper in Biological Theory, the existence of people who seem to be missing most of their brain tissue calls into question some of the.
Michael Boris Green FRS (born 22 May ) is a British physicist and one of the pioneers of string leslutinsduphoenix.comtly a professor in the Department of Applied Mathematics and Theoretical Physics and a Fellow in Clare Hall, Cambridge in England, he was Lucasian . Jul 26, · According to British biochemist Donald R.
Forsdyke in a new paper in Biological Theory, the existence of people who seem to be missing most of their brain tissue calls into question some of the. Curriculum Vitae. LISA RANDALL. Harvard University—Department of Physics.
17 Oxford Street, Cambridge, MA , USA. [email protected] () Awards and Memberships | External Advisory Positions | Editorial Positions | Named Physics Lectures | Recent and Highly Cited Papers | Books | Contributed Chapters | Contributed Articles and Blog Posts | Opera: CD Recording | .