Person nose sees hundred thousands of smells throughout the day. However, certain smells may indicate serious danger. In this case, negative experience securely fixed in the human brain, an experts note.
Scientists from the Northwestern University’s Feinberg School of Medicine showed that solitary experience of bad smells, quickly teaches us warn him the next time. “This issue relates to the evolution” – said Wen Li- the head of the research project. - “The ability to distinguish quickly the smell of danger from the other allows humans to survive in this world. Thus, thanks to the nose the person can identify and avoid the danger. ”
In the new study, participants were exposed to two different types of grass smell, which were almost identical. During the first smell perception of people simultaneously exposed electrical pulse, which causes his body in a negative state.
In the second smell there were no any electrical impulses. After receiving an electric shock people quickly learned to distinguish one smell from another, which were almost identical.
Scientists note that two smells, which were originally impossible to distinguish, since the negative impact of the additional irritant become really apparent by man. Also, scientists have shown that the smell information stored on specific ways in the special area of the human brain.
Thus, the human nose is a vital organ, which not only performs the functions of breathing, but also protects us from the dangers of the world.
Apr 09
Recent Comments