© Fotolia / mast3rСемейные relationship. Archival photo© Fotolia / mast3r
Jealousy can be useful when creating long-lasting romantic relationships, according to scientists at the University of California in Davis. The results of their research published in the journal Frontiers in Ecology and Evolution.
The scientists conducted experiments on monkeys-jumpers who go into relationships for life and hostile to those who claim to be their territory.
Males showed a cage with their females playing with other male monkeys. In addition, another group of males showed strangers females in the same situation. In the experiment, the primates were scanning the brain and measuring the level of hormones in the blood.
Scientists were able to figure out which parts of the brain arises a jealousy and how it relates to establishing long-term relationships.
Jealous monkeys have activated anterior cingulate cortex, which is responsible for social pain (occurring at parting, of loneliness in other similar cases) and the lateral septum, which are responsible for emotional processes and stress levels.
As noted by Dr. Karen bales, previous studies have shown that this partition is related to the formation of relationships between partners. A new study in turn revealed the role of this brain area in their maintenance: primates, for example, use «negative reinforcement» such as the pain of possible separation.
From the point of view of scientists, understanding of the process of the origin of jealousy in the nervous and physical levels sheds light on how we form a pair and why set up a long monogamous relationship.
«The neurobiology of pair formation is critical to understanding the development of monogamy and how it is supported as a social system,» says Karen bales.
Scientists came to the conclusion that jealousy is probably just an evolutionary way to preserve the integrity of the couple.