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Romantic Love Is An Addiction, That Develops From Sexual Desire?

Thanks to modern science, we know that love lives in the brain, not in the heart. But where in the brain is it – and is it in the same place as sexual desire?

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Along with colleagues in the USA and Switzerland, [Jim] Pfaus analyzed the results from 20 separate studies that examined brain activity while subjects engaged in tasks such as viewing erotic pictures or looking at photographs of their significant others. [...]

They found that that two brain structures in particular, the insula and the striatum, are responsible for tracking the progression from sexual desire to love. The insula is a portion of the cerebral cortex folded deep within an area between the temporal lobe and the frontal lobe, while the striatum is located nearby, inside the forebrain.

Love and sexual desire activate different areas of the striatum. The area activated by sexual desire is usually activated by things that are inherently pleasurable, such as sex or food. The area activated by love is involved in the process of conditioning by which things paired with reward or pleasure are given inherent value That is, as feelings of sexual desire develop into love, they are processed in a different place in the striatum.

[...] [T]his area of the striatum is also the part of the brain that associated with drug addiction. [Jim] Pfaus explains there is good reason for this. "Love is actually a habit that is formed from sexual desire as desire is rewarded. It works the same way in the brain as when people become addicted to drugs."

While love may be a habit, it's not necessarily a bad one. Love activates different pathways in the brain that are involved in monogamy and in pair bonding. Some areas in the brain are actually less active when a person feels love than when they feel desire. "While sexual desire has a very specific goal, love is more abstract and complex, so it's less dependent on the physical presence someone else," says [Jim] Pfaus.

from "I want to know where love is: Concordia research helps develop first brain map of love and desire"

Quoted on Wed Jun 27th, 2012