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월요일 발표된 연구조사에 의하면 담배를 피우는 행동은 뇌의 자제력에 의해 결정된다고 밝혔다.
연구가들은 중립적인 비디오영상과 흡연을 하는 사람들이 나오는 비디오를 보여준 후 실험 대상자들의 뇌의 혈류량 관계를 조사했다. 실험 전 연구가들은 몇몇 대상자들에게는 비디오 영상을 본 후 담배를 피울 수 있다고 말했고 나머지 대상자들에게는 실험이 끝난 4시간이 지난 후에야 담배를 피울 수 있다고 말했다.
흡연자 10명의 뇌를 스캔 해본 결과 기억과 행동을 결정하는 후대상회가 결정적인 역할을 한다고 밝혀졌다. 스캔 결과 담배를 피우기까지 기다려야 했던 참가자들의 혈류량이 높았지만, 후대상회의 활동을 중단시킨 후에는 후대상회의 혈류량이 현저히 낮아져 담배를 피우고 싶어하는 충동이 줄어든 것으로 확인할 수 있었다.
과학자들은 담배를 피우고 싶어하는 충동과 뇌의 관계에 관한 연구 진전에 따라 관련되는 뇌의 정확한 부분을 찾아내는데 집중하고 있다. (코리아헤럴드)
<관련 영문 기사>
Smoking addiction linked to brain’s self-control
Smokers’ craving for cigarettes is directly linked to brain’s self-control circuitry, a study showed Monday.
A research team studied the relationship between the changes in brain activities and the level of craving for a cigarette after participants watched a neutral video and a video of people smoking. Before the experiment, some respondents were told that smoking would be allowed after watching the video, while others were told to wait 4 hours to smoke after the experiment was over.
Scanning the brains of 10 moderate-to-heavy smokers revealed that dorsolateral prefrontal cortex, part of the brain that involves memory and execution function, was the cause for craving of cigarettes. While participants who waited to smoke had higher blood flow activity in dorsolateral prefrontal cortex, indicating high craving for cigarettes. For those who didn’t have to wait, blood flow dropped significantly when dorsolateral prefrontal cortex was deactivated.
Now that the brain has a critical effect on the behaviro of smokers, researchers are focused on discovering which specific area in the brain controls the impulse to smoke.
From news reports
(khnews@heraldcorp.com)
