Chimeric mice could also provide more clues about
brain evolution by helping researchers identify astrocyte specializations that are unique to humans.
One of the newly spotted genes, ASPM, was recently linked to
brain evolution by a team from the University of Chicago (Science, 9 September, p. 1662).
A decade ago, the lead author on the new study, Masato Yoshizawa, wanted to understand
brain evolution by investigating the effects of natural selection on behavior.
Not exact matches
The proof that the growing co-extension of our soul and the world, through the consciousness of our relationship with all things, is not simply a matter of logic or idealisation, but is part of an organic process, the natural outcome of the impulse which caused the germination of life and the growth of the
brain — the proof is that it expresses itself in a specific
evolution of the moral value of our actions (that is to say,
by the modification of what is most living within us).
Evolution is not good for our children - it teaches them that they are no more than monkey -
brains, when in truth, each one was lovingly constructed
by a God Who needs each individual for HIS purpose, not yours.
The key to human nature therefore lies in both the organic inheritance of
evolution through the
brain, which is instinct with natural law, harmonic order and finely tuned mutual balance, and in the free, dynamic seeking of truth and values and their free administration
by the directly created spirit.
And because the underlying commitment is philosophical, the flimsiest facts are counted as evidence - as when the president of the National Academy of Sciences recently published an article arguing that
evolution is confirmed
by differences in the size of finch beaks, as though the sprawling evolutionary drama from biochemicals to the human
brain could rest on instances of trivial, limited variation.
Dr. J. A. Hadfield, one of the most distinguished psychologists of my generation, in an essay on The Mind and the
Brain argues on a scientific basis «that in the course of
evolution the mind shows an ever - increasing tendency to free itself from physical control and, breaking loose from its bonds, to assert its independence and live a life undetermined except
by the laws of its own nature.»
In the synthesis of philosophy and science presented
by Faith, the
evolution of the human
brain at a critical juncture, the first homo sapiens, requires an external principle of control, one not determined
by material forces, but controlling and directing them.
Religion is an emotion that is hard - wired into the
brain by evolution.
By summing up this spontaneity (making its successive moments simultaneous) sufficient energy could be accumulated and released to influence the «hair - trigger» behavioral mechanisms of the
brain.23 A similar explanation is available to Bergson to account for the manner in which the vital impetus could influence
evolution,
The religious impulse was programmed into our
brains by brainless
evolution.
Yet human infants also display what are known as «secondarily altricial» characteristics — primarily lack of neuromuscular control — a consequence of the limits imposed on gestational
brain development
by the
evolution of the human pelvis.
However, in an election being dominated
by an air - headed racist with a history with bankruptcy, a
brain surgeon who doesn't believe in
evolution, and a female CEO (who was fired from the job) who hates women's rights, someone like George Pataki doesn't necessarily look like a bad choice, either.
In a study published on Nov. 16, scientists discovered that human
brains exhibit more plasticity, propensity to be modeled
by the environment, than chimpanzee
brains and that this may have accounted for part of human
evolution.
Raising a child, it turns out, is neither
brain surgery nor rocket science but something that biology, shaped
by evolution, equips us to do.
Researchers hypothesize that the technological leap was driven
by a cognitive leap, an
evolution in
brain wiring.
Honed
by hundreds of millions of years of
evolution, the
brain became a kind of ultrasophisticated — but special - purpose — computer.
Evolution has invested the
brain's anatomy with remarkable energy efficiencies
by positioning those areas most likely to communicate closer together; the closer neurons are to one another, the less energy they need to push a signal through.
The trouble, research shows, is that the
brain switches to a particular type of judgment system during stressful situations, relying on neural areas sculpted
by evolution to make quick decisions.
When they measured the concentrations in the same area in chimp
brains, the team found that the differences between chimps and normal humans were much greater for those nine than for the 12 metabolites not implicated in schizophrenia, suggesting that energy pathways implicated in schizophrenia were also altered
by human
evolution, the team reports this week in Genome Biology.
Our ideas about later human
evolution, meanwhile, have been shattered
by the remains of a tiny, novel human species with a small but intricately folded
brain.
Now scientists say that
by separating our heads from our bodies, the neck gave our
brains a leg up in
evolution.
Cosmic
evolution, the structure of matter, the origins of life, and understanding how the
brain works all deserve strengthened support, according to China's latest 5 - year development plan, which could triple funding for basic research
by 2020.
But this should not deter you, for there are plenty more accessible contributions such as those
by Coppens («
Brain, locomotion, diet, and culture: how a primate, by chance, became a man»), Phillip Tobias on «The brain of the first hominid» and Rebecca Cann's chapter «Mitochondrial DNA and human evolution», which as a relative novice, I found very hel
Brain, locomotion, diet, and culture: how a primate,
by chance, became a man»), Phillip Tobias on «The
brain of the first hominid» and Rebecca Cann's chapter «Mitochondrial DNA and human evolution», which as a relative novice, I found very hel
brain of the first hominid» and Rebecca Cann's chapter «Mitochondrial DNA and human
evolution», which as a relative novice, I found very helpful.
One of the critical lines of evidence for the
evolution of the human is that provided
by «fossil
brains» or fossilised calvariae (the top part of the skull), which has been unfairly compared to phrenology.
A research team headed
by Wieland Huttner, director at the Max Planck Institute of Molecular Cell Biology and Genetics, now reports an important finding that paves the way for further research on
brain evolution: The researchers analyzed the gyrencephaly index, indicating the degree of cortical folding, of 100 mammalian
brains and identified a threshold value that separates mammalian species into two distinct groups: Those above the threshold have highly folded
brains, whereas those below it have only slightly folded or unfolded
brains.
Now, however, the two australopithecines are surrounded
by digital displays, computer animations, and a multimedia Human Bulletin that broadcasts the latest news in human genetics,
brain science, and
evolution.
Was it a rational decision learned in childhood, or was it — as Harvard evolutionary biologist and cognitive neuroscientist Marc Hauser claims — based on instincts encoded in our
brains by evolution?
Complex Tears: Why Humans Like to Cry: Tragedy,
Evolution, and the
Brain by Michael Trimble Oxford University Press, 2012 ($ 29.95)
The newly created Paul G. Allen Frontiers Group has selected four initial researchers — Jennifer Doudna of the University of California (UC), Berkeley, Ethan
Bier of UC San Diego, James Collins of the Massachusetts Institute of Technology in Cambridge, and Bassem Hassan of the
Brain and Spine Institute in Paris — to receive $ 1.5 million each to study topics ranging from novel techniques for gene editing, how shapes and forms arise over the course of
evolution, and how synthetic biology can create microbes that trap and kill dangerous bacteria.
A carbon threshold breached, commitments to
brain science made, mystery neutrinos found and human
evolution revised — these and other events highlight the year in science and technology as picked
by the editors of Scientific American
For more than three decades evolutionary psychologists have advanced a simple theory of human sexuality: because men invest less reproductive effort in sperm than women do in eggs, men's and women's
brains have been shaped differently
by evolution.
The researchers identified fast - evolving species
by comparing differences between groups with those obtained when simulating
evolution at a constant rate across all lineages, and they found clear differences between tooth
evolution and
brain evolution.
This suggests that
brain sleep dates back at least to the
evolution of the amniotes, that is, to the beginning of the colonization of terrestrial landmass
by vertebrate animals.
By nested hierarchy I mean a way of looking at the
brain, looking at its layers and how they developed over the course of
evolution.
Rather than inheriting big
brains from a common ancestor, Neandertals and modern humans each developed that trait on their own, perhaps favored
by changes in climate, environment, or tool use experienced separately
by the two species «more than half a million years of separate
evolution,» writes Jean - Jacques Hublin, a paleoanthropologist at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, in a commentary in Science.
Laland acknowledges that rapid
evolution of the
brain is not «inevitable
by any stretch of the imagination.»
Next, Bertolero said, he and his co-authors plan to look into why
evolution built a
brain with distinct networks and connector hubs, precisely how connector hubs integrate and coordinate, and what happens when they are damaged
by a stroke, for example.
The real question is, will human
evolution continue to be limited
by the ponderous rate of nature or will we overcome even this limitation with our
brains?
By pairing these results with a look at the primate family tree, the team concluded that sometime in the recent
evolution of humans, our
brains outpaced chimp
brains.
Researchers from the University of Wyoming and INRIA (France) led
by Henok S. Mengistu simulated the
evolution of computational
brain models, known as artificial neural networks, both with and without a cost for network connections.
Now,
by studying the lamprey, Caltech researchers have discovered an unexpected mechanism for the
evolution of the neurons of the peripheral nervous system — nerves outside of the
brain and spinal cord.
Primate
brain size
evolution is predicted
by diet but not sociality.
The comparison of the relative size of the prefrontal region in primate
brains is described in a paper titled «No relative expansion of the number of prefrontal neurons in primate and human
evolution»
by Herculano - Houzel and postdoctoral fellow Mariana Gabi published online this week in the Proceedings of the National Academy of Sciences early edition.
The rapid advance of the human
brain, the authors maintain, has not been driven
by evolution of protein sequences.
Rather,
brain size is more accurately predicted
by primates» diet, according to their new study published in the journal Nature Ecology and
Evolution.
Organization and
evolution of
brain lipidome revealed
by large - scale analysis of human, chimpanzee, macaque, and mouse tissues.
By labeling HAR1 molecules in human and macaque embryos, we discovered that the RNAs functioned in neurons during patterning and layout of the cortex, 6 a
brain structure that expanded greatly in size during human
evolution.7 Exactly which genes HAR1 is regulating remains to be determined.
Evolution of the mammalian
brain, in part, has been enabled
by a class of glial cells, oligodendrocytes, which provide the myelin.