Scientists have described how the aggression changes the brain
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Aggressive behavior leads to the appearance of new nerve cells in the brain, scientists say. Today we are talking about why is aggression changes the brain!
An international team of neuroscientists has confirmed experimentally influence aggression in the formation of new nerve cells in the brain. Scientists have conducted a series of experiments with male mice and published their results in the journal Frontiers in Neuroscience.
In the experiment, a pair of male scientists planted into a cell grid divided into two parts. The grid allows you to see and hear each other but does not let the mice fight. Every day the grid was removed and began observation: as a rule, have to wait long to fight. After two or three skirmishes determine the winner, which then (within three minutes or earlier if there are concerns about the fate of the loser) is again separated from the neighbor mesh. In addition, experiments were carried out and the other aimed at to identify the behavior of the aggression changes the brain mouse in different situations with regard to the relatives.
Why is aggression changes the brain?
The researchers studied the changes that occur in the brains of mice, the aggressors who attacked their brothers and thus won the fights. Such animals after winning became more aggressive, and their hippocampus — one of the key structures of the brain — there were new neurons. In relative terms, the effect varied from tenths to two times increase in the number of new neurons, and for all four strains of mice used in the experiments, the effect was statistically significant.
Moreover, the fight when certain changes were observed in the tonsil of nerve cell activity. Scientists note that the amygdala in humans is involved in a number of pathological processes, including the formation of autism. Increased anxiety, stereotyped repetitive behavior, impaired ability to communicate with others — these symptoms have been observed in mice of the experiments described above, and partly similar to those isolated in the picture of autism.
Scientists hope that the new information about the neurobiological bases of aggression will not only help in the understanding of this phenomenon but also encourage research in other areas — up to search for the causes of autism and similar disorders to him in humans.