Sentences with phrase «on brain size»

Using statistical techniques, the researchers made adjustments to account for these known effects on brain size.

To investigate the matter, Fox, Muthukrishna, and senior author Susanne Shultz of the University of Manchester assembled the world's largest dataset of information on brain size, social structures, and cultural behaviors across cetacean species.

Full dataset on brain size, body size, diet, social / mating systems, group size and estimates of early Eocene fossil primate brain volumes, complied from published literature sources.

Such dramatic effects on brain size and function are unlikely in human carriers of BRCA1 mutations, the authors of the study note, but they propose the findings could shed light on the gene's role in brain evolution.

Not exact matches

Depending on the size and location of the pressure on the brain, MedicineNet noted that a subdural hematoma could cause slurred speech, nausea, vomiting, seizures, and confusion.

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.

In 1986 after collapsing in a department store in Georgetown, doctors discovered a cyst the size of a dime on his brain.

The brain grows on average three times as large by the end of the first year (and head size growth in the first year is a sign of intelligence, e.g., Gale et al., 2006).

They are born with brains about half the size they'll eventually grow to, on average with 50 % of their adult brain whereas human baby's brains are only about 25 % as big as human adults» brains.

Each individual brain is different, and whether a concussion occurs depends on age, gender, size, injury history and a host of other variables, some of which are still unknown to medical experts.

«We want to see whether this difference in brain size has an effect on any of those developmental milestones,» Rogers said.

A study by Luby and other WUSM researchers showed that a mother's love had a physical effect on the size of her child's hippocampus — the area of the brain responsible for memory.

«We want to see whether this difference in brain size has an effect on any of those developmental milestones,» Dr. Rogers said.

The team's analyses, which covered 90 species, revealed that brain size was best predicted by a score based on various social behaviors such as cooperation with other species, group hunting and complex vocalizations.

It was practiced by some of our earliest ancestors, such as Homo habilis and the even older Australopithecus garhi, who walked on two legs, but whose facial features and brain size were closer to those of apes.

«Our own previous study on Facebook could only show correlation between social network size and the brain, but we could not determine the direction of causation between social brain regions and social network size,» notes Ryota Kanai of University College London, one of the researchers on the study.

Our brains may be spotting any number of potential cues — the way a doctor is dressed, the words she chooses to describe a drug, the size of the needle she uses, or even the painting on her wall, which the patient fixates on as the needle goes in.

«In addition, when we compared adult brain proportions, we saw that the relationship between brain proportions and size depends on what group of mammals we look at, which is also incompatible with a universal rule for brain proportions.»

The amygdala, a pair of almond - size regions on either side of the brain, helps process emotional information.

What Phyllis Goldstein's letter on the end of evolution of brain size (22 October, p 35) overlooks is that the...

Most people know that the familiar tale is based on books by Lewis Carroll, but few realize that Carroll himself suffered from an unusual neurological condition that alters how the brain perceives the size of objects.

On the fly, neurosurgeons can use the pen - sized instrument on the brain to view the tumor cells with unique fluorescent characteristics that outline the tumor cellOn the fly, neurosurgeons can use the pen - sized instrument on the brain to view the tumor cells with unique fluorescent characteristics that outline the tumor cellon the brain to view the tumor cells with unique fluorescent characteristics that outline the tumor cells.

As well, the brain of El Sidrón J1 was roughly 87.5 % of the size of an average adult Neandertal brain upon death, whereas modern humans tend to have on average 95 % of adult brain weight by that same age.

This was a presentation given by Tom Schoenemann of the University of Michigan at Dearborn, and what he did was to survey cranial capacity and body weight data, so brain size and body weight data for a bunch of modern humans and also [a] fossil one, and he plotted all of this on a graph and he determined that the brain size of the Flores hominid relative to her body size more closely approximates that what you see in the Australopithecines, which are much older, you know.

Men's brains are bigger than women's — about 100 grams heavier on average — even when their larger proportional size is factored into the equation.

The brain - size - altering effect of the gene is what led the researchers to study the impact on IQ.

ICELL8 can isolate up to 1,800 single cells, ranging from 5 μm — 100 μm in size on a single chip, including cells from solid tumors, brain cells, pulmonary airway cells, and multiple cell lines.

«Depending on the size of the cell, we estimate that between 13 percent and 40 percent of brain cells will be hit once by cosmic rays,» Vazquez explains.

Although Lucy had a brain and body the size of a large chimp — and probably slept in a tree nest — she walked fully upright and her species may already have lost its agility in trees as it adapted to life on the ground.

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.

His notion was that human abilities are localised and, when highly developed, could be felt as «bumps» on the skull caused by locally increased brain size.

A study of red deer on a Scottish island reveals some of the first evidence in wild mammals of a clear link between brain size and evolutionary fitness

«The tool - using features of the H. naledi hand, in combination with its small brain size, has interesting implications for what cognitive requirements might be needed to make and use tools, and, depending on the age of these fossils, who might have made the stone tools that we find in South Africa,» Tracy Kivell at the University of Kent in England, lead author of one of the two H. naledi papers, said in a statement.

In a study reported in the journal Nutritional Neuroscience, the researchers looked for relationships between several omega - 3 fatty acids in the blood, the relative size of structures in the frontal and parietal cortices of the brain, and performance on tests of fluid intelligence in healthy elderly adults.

To replicate the brain in miniature, Parker and his team started with an elastic substrate about the size of a fingernail, then added a layer of cells on top to mimic networks of blood vessels in the brain.

Given that the So'a hominins were already hobbit - sized 700,000 years ago, and that H. erectus didn't arrive on neighbouring islands until about 1.2 million years ago, the hominins would have had only a few 100,000 years to shrink perhaps 70 centimetres to just 1 metre tall, and shed about half their adult brain volume.

The study, published in the open access journal Acta Neuropathologica Communications, showed that in experiments on mice, an immune - based treatment reduced the size of brain lesions.

«Since the Bronze Age, the brain shrank a lot more than you would expect based on the decrease in body size,» Hawks reports.

They found that the TLR3 inhibitor significantly tempered Zika virus» severe effects on brain cell health and organoid size, underscoring TLR3's role linking infection and brain damage.

The analysis also discovered that the raccoon was an outlier — on the brainy side: It packs the same number of cortical neurons as a dog into a brain the size of a cat's.

That's because compared with other primates, humans give birth to babies with larger bodies and brains — on average, human babies are 6.1 % of their mother's body size compared with chimp babies (3.3 %) and gorilla babies (2.7 %).

On average, the size of primates» brains is nearly double what is expected for mammals of the same body size.

Previous research suggests our ability to cooperate and exhibit empathy — both thought to be critical to human success — relied in part on the large brains of our hominin ancestors, relative to body size; and that selection against aggression within early human populations allowed us to thrive.

Similar to the human brain, the fly brain, which is about the size of a grain of sand, is encased in the hard shell of its exoskeleton and cushioned by a layer of fluid that allows the brain to slosh around on impact.

But destruction of tissue the size of a sugar cube in the brain stem and in parts of the thalamus, especially if they occur simultaneously on the left and right sides, may leave the patient comatose, stuporous or otherwise unable to function.

Domestic dogs, who are descended from cooperatively breeding wolves, and elephants also perform better on socio - cognitive tasks, such as imitation, compared to other animals of similar brain size.

Near the end of the article on human evolution, the author suggests that the primary limitation on human brain size is female hip structure.

The results could also inspire new ways to improve performance in school or on the job.In recent years, researchers have gained a greater appreciation of the importance of eye movements and pupil size for focusing the mind, and how the brain might regulate these behaviors.

It was practiced by some of our earliest ancestors, such as Homo habilis and the even olderAustralopithecus garhi, who walked on two legs, but whose facial features and brain size were closer to those of apes.

Brain size seems to have nothing to do with scores on standardized intelligence tests, according to a brain - scan study of young chilBrain size seems to have nothing to do with scores on standardized intelligence tests, according to a brain - scan study of young chilbrain - scan study of young children.