近日，有研究人員表示讓我們對食物和性產生渴望的那部分腦組織同時也影響著我們的性情。這篇發表在《歐洲神經科學雜志》上的研究報告稱，在大腦的某個區域較為集中的腦組織會讓人更加熱情、也更容易對別人產生感情。研究人員表示他們可以明確判定一個人個性的某個方面與其大腦某個特定區域之間的關系， 而這個特定的區域同時也主宰著人們對食物和性的基本生理需求。

The same part of the brain that makes us crave food and sex may also help determine whether somebody is a warm and sentimental "people" person.

The same part of the brain that makes us crave food and sex may also help determine whether somebody is a warm and sentimental "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 gush 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 collaborated 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 analyze 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 stimuli, the researchers said.

"Sociability 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 disorders 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."

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(Agencies)

Vocabulary:

orbitofrontal cortex: 眼窩前額皮質

（英語點津 Helen 編輯）