Regions of the brain!!

http://www.youtube.com/watch?v=g6KpIrKCDwg

Why revenge is sweet?

 Who of us have not feel anger when somebody kick us, or when somebody tell us a lie, or when somebody says something he or she is not going to do and 10 minutes after he do it????????? And after anger become the thirst of revenge?......  And yes as we have feel many of us revenge its sweet, many of us have felt that way when we do revenge; but now scientists had reveled why.

A new brain imagining study suggest that we feel satisfaction when we punish other people for bad behavior or others things that they do, because some anticipation of pleasure drives us to crack the whip, this according to that new studies about the brain made by the scientists.

A person who has been cheated is left on a bad situation with bad feelings- said some study; all the societies around us the humans we are anomaly in the animal world.

Some scientists suggest that the feeling of satisfaction persons gets from meting out altruistic punishment is the thing that may be keeping societies together.

Theory and experimental evidence shows that cooperation among strangers is greatly enhanced by altruistic punishment, Cooperation among strangers breaks down in experiments if altruistic punishment is ruled out. Cooperation flourishes if punishment of defectors is possible.

The brain on mammals & primates

 THE BRAIN ON MAMMALS:

On mammals there is really big difference in the brain in terms of size.

However the size is not just the only difference there are also some differences in the shape of the brains. The hindbrain and the midbrain is almost always very similar to those of the vertebrates. One of the things that mostly strongly distinguish mammals is the cerebral cortex that is a neural tissue that is the outer most to the cerebrum in the mammals brains, in non mammalian there is a really big difference the brain is more enlarged and the shape of the brain in this animals is more different .

THE BRAIN ON PRIMATES:

 The brains of humans and other primates contain the same structures as the others mammals, but always are generally larger. The human average is bigger than the primates.

The enlarged of the brain in primates it comes form a really big expansion of the cerebral cortex but specially the prefrontal cortex and some parts of the cortex that are involved in vision. The prefrontal cortex it carries really important functions almost vital for humans as motivation, attention, executive control, planning, and working memory.

The brain on vertebrates

Some of the first vertebrates animals appear around of 500 million years ago, they may have a resembled the modern hagfish in form.

The sharks appear around 450 million years ago, the amphibians around 400 million years ago, the reptiles about 350 million years ago and the mammals around 200 millions of years ago any of this species could be described as more primitive than other one because each one has an equally long evolutionary history;  but anyway the brains of the modern hagfishes such as lampreys, sharks, reptiles and mammals, all the brains of this animals contain the same basic anatomical components.

It is very simple compared on the brains on the terms of their size, there a relationship between brain size and body size that it has been studied across a very long range of vertebrate species. It is almost a rule as the body size gets big the brain size increase also but this does not happened in a simple linear proportion,

Normally animals with small size use to have a very long brains, this size of the brain is measured as a fraction of the body size.

Soft tissue is the material that conform the brain of the vertebrates, this tissue is pink in the outside of the brain, but it is very able to a variations in color.