Recently researchers from the University College of London captured images of enamored brains and concluded that before the vision of the beloved not only activated some areas of the brain, such as the anterior cingulate cortex, which also responds to the stimulation of synthetic drugs producing feelings of euphoria, but the areas responsible for making social judgments and subjecting others to valuation, are inactivated, turning us blind with love. Although we are attracted to people with traits similar to ours, we tend to choose the smell of those who have an immune system different. And before a person looks at another has already built a mental map, a complete mold of brain circuits that determine what will make you fall in love with one person and not another. Even the blood type influences (A, B, AB, O), because the attraction tends to happen with people of the same type.Action: They fall in love with their eyes and they, with their earIn the first stage of love, falling in love, the eyes of man, the ears of women, and the smell in both, especially pheromones, are substances that different animals secrete and that produce modifications in the opposite sex and have to do with attraction. When dancing a pheromone factory is produced, which depending on the stage of life in which both are, can make it give instant attraction (love at first sight). After orgasm, the limbic system of the brain releases the hormone oxytocin. According to the University of Edinburgh expert, Gareth Leng, oxytocin helps to forge permanent bonds between lovers. The hormone acts by changing the connections of the billions of brain circuits. Leng points out that this substance strengthens the bond between a mother and her baby, and occurs both during a birth and in an orgasm. Makes the couple feel more connected and emotionally close. When this is combined with estrogen, female hormones, the woman feels affectionate and talkative. But when mixed with the male hormones, testosterone, can cause him an overwhelming need to sleep. If you have enough relationships with it person is very likely that this hormone pump makes us lose our heads for someone. Falling in loveFrom biochemistry, falling in love is explained by the intervention of monoamine substances such as dopamine, a neurotransmitter and a hormone that is associated with a system of reward and pleasure in the brain, so when we secrete it we feel very well, says Leonardo Palacios Sánchez, neurologist and dean of the Faculty of Medicine of the Universidad del Rosario. Studies carried out with functional magnetic resonance images allow us to see that when a person in love sees the photo of the loved one or hears his name and compares it with a neutral subject, areas of the brain are activated. This makes him or the girlfriend act strangely lose the judgment, everything seems perfect; his sleep is disturbed, and although he does not feel upset after the night. Experience less pain The attention is disturbed, everything is forgotten, it does not do what it was entrusted to it. To this process is added the substance neural growth factor, and reduces the neurotransmitter serotonin, which causes the person to have obsessive thoughts and behaviors by the other. The narcotic of love Phenylethylamine (FEA), amphetamine that secretes the body, is a of the substances involved in falling in love. This compound activates the secretion of dopamine, a neurotransmitter involved in feelings of desire that makes us repeat what gives us pleasure, and produces oxytocin that activates sexual desire. When the brain is flooded with this substance, it responds by secreting dopamine, the neurotransmitter responsible for the reinforcement mechanisms of the brain, the ability to desire something and to repeat a pleasure-producing behavior, norepinephrine and oxytocin, which besides stimulating uterine contractions for the birth and produce milk, is a chemical messenger of sexual desire, and stimulates the neurotransmitters that cause falling in love. Such a mixture of compounds causes the lovers to spend hours making love and nights talking, without fatigue, they are always excited, they need the other as a drug and their ability to judge it is reduced to zero. The substances of the embrace and the monogamy After one to three years, the couple begins to consolidate and the brutal production of dopamine drops, substances that accelerate, and couples pass to the intellective attraction.