Sentences with phrase «brain size among»

There is some variation in brain size among different dog breeds, but that is mostly due to variation in body size.

Not exact matches

Among the questions that this study raises are whether the surprisingly large number of neurons in bird brains comes at a correspondingly large energetic cost, and whether the small neurons in bird brains are a response to selection for small body size due to flight, or possibly the ancestral way of adding neurons to the brain — from which mammals, not birds, may have diverged.

USING YOUR BRAIN In «The Limits of Intelligence,» Douglas Fox points out that human intelligence is limited by communication among neurons in the brain, which is limited in turn by the size of our neuBRAIN In «The Limits of Intelligence,» Douglas Fox points out that human intelligence is limited by communication among neurons in the brain, which is limited in turn by the size of our neubrain, which is limited in turn by the size of our neurons.

By comparing the numbers of nerve cells, or neurons, among eight species of carnivores (ferret, banded mongoose, raccoon, cat, dog, hyena, lion and brown bear), researchers now have a better understanding of how different - sized brains are built.

Comparing brain size and number of nerve cells in the cerebral cortex among several animal species revealed some surprises.

If so, it would mean that, rather than being an 18,000 - year - old representative of a new species, the hobbit was just a modern human with a growth disorder that left it with a brain the size of a grapefruit, among other odd traits, which is what critics have argued all along.

But even among the smartest bird species, there's still natural variation in brain size.

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.

The 1 autistic child with a brain size within the 95 % CI of controls had among the greatest prefrontal neuron counts in the study, which raises the question of whether excess prefrontal neuron counts may be present in other autistic children who have near normal or smaller brain sizes.

Despite the explosive growth in size and complexity of the human brain, the pace of evolutionary change among the thousands of genes expressed in brain tissue has actually slowed since the split, millions of years ago, between human and chimpanzee, an international research team reports in the December 26, 2006, issue of the journal, PLOS Biology.

Each theory makes predictions about the various relationships between brain size, features of societal organization, lifespan, length of childhood, and social learning, among other factors.

Studies have also indicated that B12 prevents brain shrinkage, making this vitamin and it's benefits an area of interest for researchers as reduced brain size is commonly seen among those with dementia and Alzheimer's.

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.

There are various causes for unequal pupil size in dogs which may include head trauma, eye injuries, poisoning, brain tumours (too young) among other causes; I can not think of a specific reason why Miya had this episode, but if her eye is back to normal you should keep a close eye to see if it happens again.