The picture above shows
the brain size differences between a typical child's brain and a child who had been deprived of early loving relationship.
It's possible that this pattern of female addiction could be linked to
the brain size difference.
Not exact matches
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.
Everything from the chemicals in your new - mom
brain, to your pants
size can see some kind of
difference.
«We want to see whether this
difference in
brain size has an effect on any of those developmental milestones,» Rogers said.
«We want to see whether this
difference in
brain size has an effect on any of those developmental milestones,» Dr. Rogers said.
Neandertals had a similar
brain size — to - body ratio as we do, so rather than cranial capacity, it might have been underlying neurological
differences that could explain why we flourished while they died out, he said.
Other factors may also be important in birds, which show a greater
difference in
brain size than bats.
The
difference in diet explained 0.5 percent of the variation in total
brain volume, an effect that was half the
size of that due to normal aging.
Scientists are particularly curious about
differences in
brain size, since adult Neandertals tend to have a cranial capacity of about 1,500 cubic centimeters and modern day humans have a cranial capacity of about 1,350 cubic centimeters.
This study is complementary to another that found adults with anorexia and individuals who had recovered from this illness also had
differences in
brain size, previously published in the American Journal of Psychiatry, 2013.
For example, it can tell us that race and gender
differences in
brain size are unrelated to intelligence.
Despite
differences in
brain size, the researchers found striking similarities between primate species of gene expression in 16 regions of the
brain — even in the prefrontal cortex, the seat of higher order learning that most distinguishes humans from other apes.
It also suggests dominance drives
differences in
brain size in sweat bees.
These maps, they say, will show everything from relative
sizes of anatomical features to
differences in
brains associated with age, race, gender, educational background, genetic composition, and other distinguishing characteristics.
However, many other
differences between species could also influence
brain size.
Six month after this test phase, individual fish
brains were measured to investigate the long term consequences of early group
size on
brain morphology, revealing
differences in
brain architecture.
In terms of
size, there wasn't much
difference in how
brains varied among family members: Closely related individuals of both species tended to have very similar
brain volumes.
Differences in
brain size within a species, such as humans, are relatively small, making it difficult to tease out the effects of
brain size and the effects of other factors.
Ultimately, we will test how
differences in
brain size contribute to the shape and development of the skull between species and the evolution of rapid skull expansion found in mammals.
Building on this work, the team has now determined that there are seven areas in our DNA where
differences in the genetic code are associated with intracranial volume, which is the
size of the skull cavity in which the
brain resides.
Once
differences in body and visual system
size were taken into account, the researchers could then compare how much of the
brain was left over for other types of cognition.
Besides the obvious
size difference — the human
brain is about three times larger than the chimp
brain — little has been known about how the human
brain and the rest of the nervous system changed in our lineage over evolutionary time.
First, sensitive MRI
brain scans, that are able to very accurately measure the shape and
size of people's
brain, could measure
differences amongst every group in the study.
Because of the obvious humanness of the Turkana Boy fossil, and the fact that H. erectus
brain sizes overlap the extreme lower range of modern human
brain sizes, creationists have nowadays almost entirely abandoned the old line (popularized by Duane Gish) that Peking Man and Java Man are apes, and now generally claim that Homo erectus fossils are a variant form of modern humans (ignoring the inconvenient fact that there are many obvious
differences between Homo erectus and Homo sapiens).
One such study showed that men have larger
brains than women, a 100 gram
difference after correcting for body
size.
«They are almost identical in body
size, in stature, and in
brain size, she notes, and the major
differences (the hip and the foot) represent the younger Lucy's adaptation to bipedal walking.»
Neuroscientists have shown that chronic stress can even cause
differences in grey and white matter in the
brain, as well as the
size and connectivity of the amygdala.
The
difference in diet explained 0.5 % of the variation in total
brain volume, an effect that was half the
size of that due to normal aging.
If there's a
difference in the
size of
brains among dog breeds, but bigger doesn't mean smarter, you might wonder which breeds are considered the smartest.
And you with a «
brain the
size of a planet» who has independently analysed the various records and shown that most adjustments have made no
difference to the actual rise since the seventies.
Differences in the
sizes of the two halves of the
brain, in the patterns of blood flow to the
brain, and in the nerve impulses to the
brain were often seen.
Differences have also been found in the
size or activity of certain
brains regions in some cases.
Developmental
differences are correlated with relative
brain size in birds: a comparative analysis
Morphologic studies offered some preliminary support for
brain - related
differences between children with and without the disorder, but additional studies with control groups of children with other psychiatric and developmental disorders and larger sample
sizes will be necessary before
brain morphology becomes useful in diagnosing ADHD.
Past research has found a significant correlation between overall cognitive ability and individual
differences in
brain size, age, sex, social class, and ethnic background.
Neurological research actually shows visible signs of
difference in
size and structure of healthy infant
brains and those of infants who have been neglected or abused.