- P-ISSN1226-9654
- E-ISSN2733-466X
- KCI
얼굴 매력도와 표정 정보 처리에 특정적으로 관련된 신경학적 기제들에 관한 fMRI 연구
Functionally distinctive neural circuities involved uniquely in encoding facial attractiveness and facial happiness
성영신 (고려대학교)
김학진 (고려대학교)
초록
얼굴 매력도와 긍정적인 얼굴 표정은 선호판단 등과 같은 얼굴인상형성에 있어 중요한 신호들을 제공하며 다양한 사회적 상호작용과 의사결정과정에 많은 영향을 미치는 것으로 알려져 있다. 본 연구에서는 얼굴의 매력도와 긍정적 얼굴 표정처리에 자동적으로 그리고 특정적으로 관여하는 신경학적 기제들을 알아보기 위해 자기공명영상 기법(fMRI)을 사용하였다. 뇌영상을 촬영하는 동안 참가자들은 빠르게 제시되는 얼굴들을 기억하는 과제를 수행하였고, 실험이 끝난 후 기억과제에 사용되었던 얼굴 사진들을 다시 보며 각 얼굴에 대한 매력과 얼굴표정의 정서가를 평가하였다. 각 얼굴사진에 대한 집단 평균 매력도와 얼굴표정 정서가에 의해 독립적으로 상관을 보이는 뇌영역들을 알아 본 결과 ventral striatum, amygdala, 그리고 hippocampus를 포함하는 medial temporal lobe영역은 얼굴의 매력도와 정적 상관관계를 보였던 반면, rostral cingulate cortex와 posterior cingulate cortex영역들은 얼굴의 긍정적 정서가와 정적 상관을 보이는 것으로 관찰되었다. 본 연구 결과들은 얼굴 매력도와 긍정적인 얼굴 표정 정보를 의식적 노력없이 자동적으로 부호화하는 독립된 뇌기제들이 존재하며 이러한 기제들이 다양한 사회적 상황에서 얼굴 선호판단에 암묵적인 영향을 미칠 가능성을 시사하고 있다.
- keywords
- 복측선조체, 편도체, 대상전회, 자기공명영상, face, ventral striatum, amygdala, cingulate, hippocampus
Abstract
In the present study utilizing functional MRI technique, we aimed to examine the neural circuitries uniquely involved in encoding facial attractiveness and happy expression in the absence of explicit attention. While being scanned, 22 female subjects performed a simple working memory task, where they were asked to report whether a target face was included in an immediately preceding block of 10 novel faces. At the end of the experiment, subjects saw all the faces once again and rated each of them in terms of subjectively perceived facial attractiveness and happiness. In order to examine the neural systems engaged uniquely in encoding facial attractiveness and facial happiness, the hemodynamic responses to face images were modulated separately by the parameters of normative facial attractiveness and happiness ratings. The analyses revealed that the ventral striatum as well as the medial temporal lobe including the amygdala and the anterior hippocampus showed a significant positive correlation with facial attractiveness, but not with facial happiness, whereas the rostral anterior cingulate cortex and posterior cingulate cortex showed a significant positive correlation with facial happiness, but not with facial attractiveness. To our best knowledge, the present study demonstrated for the first time that facial attractiveness and facial happiness may be encoded by separate neural mechanisms even in the absence of direct attention.
- keywords
- 복측선조체, 편도체, 대상전회, 자기공명영상, face, ventral striatum, amygdala, cingulate, hippocampus
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