The Chinese population showed greater structural features in the temporal lobe and cingulate gyrus, and smaller features in the frontal lobe and parietal lobe, compared with the Caucasian cohort.
The world's largest survey of brain sizes, conducted by American scientists three decades ago using more than 20,000 modern human skulls from around the globe, found that the average cranial volume among East Asians was 1,415 cubic centimetres, compared with 1,362 for Europeans and 1,268 for Africans.
In healthy volunteers, total brain volume weakly correlates with intelligence, with a correlation value between 0.3 and 0.4 out of a possible 1.0. In other words, brain size accounts for between 9 and 16 percent of the overall variability in general intelligence.
Researchers have previously shown that a person's IQ is highly influenced by genetic factors, and have even identified certain genes that play a role. They've also shown that performance in school has genetic factors. But it's been unclear whether the same genes that influence IQ also influence grades and test scores.
Decades ago, scientists conducted testing on the person considered to be one of the most famous geniuses of all time: Albert Einstein. They found that there was no difference between how large his brain was compared to the brain size of individuals of average intelligence.
Among the most studied racial or ethnic groups, people of East Asian descent usually have the highest average IQ, followed by people of European ancestry. Hispanics have a lower average IQ than these groups, and people of African ancestry have the lowest average.
Thus, out of the given organisms, Homo habilis with 650-800cc has the smallest brain capacity.
elegans, a 1mm-long worm which has just 302 neurons compared to the estimated 86 billion neurons of a human brain. It is the only brain to be fully mapped by scientists.
Koalas, like many other primitive animals, have a smooth (or lissencephalic) brain, meaning that their brains have no folds! This is why koalas are often unable to perform complex behaviours.
Heaviest human brain recorded weighed 2.3 kg.
Each ant's brain is simple, containing about 250,000 neurones, compared with a human's billions. Yet a colony of ants has a collective brain as large as many mammals'. Some have speculated that a whole colony could have feelings.
A: It's possible to keep an isolated brain alive, but only briefly. And for ethical and practical reasons, many experts steer clear of this scenario. Scientists first kept a mammalian brain alive outside its body for about eight hours in the early 1990s.
"I can guarantee you that no human, no matter how you did it, would be surviving for 18 months after the brain was cut off," Zemmar said.
However, a new study published to Frontiers in Aging Neuroscience suggests that your brain may remain active and coordinated during and even after the transition to death, and be programmed to orchestrate the whole ordeal.
Brain death (also known as brain stem death) is when a person on an artificial life support machine no longer has any brain functions. This means they will not regain consciousness or be able to breathe without support. A person who is brain dead is legally confirmed as dead.
New neurons are made in just two parts of the brain—the hippocampus, involved in memory and navigation, and the olfactory bulb, involved in smell (and even then only until 18 months of age). Aside from that, your neurons are as old as you are and will last you for the rest of your life.
Ants are similar to many other insects in that they possess senses such as hearing, touch and smell. Although hearing is very different in ants than animals that typically have ears, ants do possess the capability to hear.
Over 15 years ago, researchers found that insects, and fruit flies in particular, feel something akin to acute pain called “nociception.” When they encounter extreme heat, cold or physically harmful stimuli, they react, much in the same way humans react to pain.
Flies appear to "think" before they act and, like humans, take longer to make trickier decisions, a study has found. Scientists admitted to being surprised by the discovery, which indicates that even insects show signs of intelligence.
Leech: The interior structure of a leech is divided into 32 different segments, each of which has its own brain.
Are dolphins smarter than humans? Current tests for intelligence indicate that dolphins do not possess the same cognitive abilities as humans and are thus not the "smarter" species. Like humans, dolphins possess the ability to beneficially alter their surroundings, solve problems, and form complex social groups.