近日，有研究人员表示让我们对食物和性产生渴望的那部分脑组织同时也影响着我们的性情。这篇发表在《欧洲神经科学杂志》上的研究报告称，在大脑的某个区域较为集中的脑组织会让人更加热情、也更容易对别人产生感情。研究人员表示他们可以明确判定一个人个性的某个方面与其大脑某个特定区域之间的关系， 而这个特定的区域同时也主宰着人们对食物和性的基本生理需求。

The same part of the brain that makes us crave¹ food and sex may also help determine whether somebody is a warm and sentimental² "people" person, researchers said on Wednesday.

Scientists found a greater concentration of brain tissue in certain areas of the brain may drive some people to gush³ fuzzy feelings more than others, they reported in the European Journal of Neuroscience.

"It is interesting that we can pin down this relationship between a specific aspect of your personality and a specific region of the brain," Graham Murray of Cambridge University in Britain, who led the study, said in a telephone interview.

"Those are the regions that we know are important for basic biological drives like for food and sex."

The researchers, who collaborated⁴ with a team at Oulu University in Finland, used questionnaires to help measure the relationship between personality and brain structure in 41 men.

The volunteers were asked how well they thought they connected to people, how they showed their emotions and whether they liked to please people. The researchers used brain scans to analyze⁵ the concentration of grey matter -- tissue rich in brain cells known as neurons -- in different regions.

People who scored "warm and fuzzy" on the questionnaires had more brain tissue in the orbitofrontal cortex -- the outer strip of the brain just above the eyes -- and in a deep structure in the center of the brain called the ventrial striatum, the study found.

Previous research showed the two areas were important for how the brain processed certain pleasures such as sweet tastes or sexual stimuli⁶, the researchers said.

"Sociability⁷ and emotional warmth are very complex features of our personality," Murray said. "This research helps us understand at a biological level why people differ in the degrees to which we express those traits."

Cultural differences could also play a role, Murray said, and gave the example that Americans tended to score higher on personality tests than Scandinavians.

He said the new findings could offer clues into how the human brain evolved and offer insights into psychiatric disorders⁸ marked by problems with social interaction like autism or schizophrenia.

"Maybe the brain structure that supports social interaction evolved out of the brain structures that supported basic survival drives," he said. "It opens a line of enquiry to investigate some of these problems that psychiatric patients may have."