额颞脑区在概念扩展中的作用及其与大五人格的关系

Activities of Prefrontal-temporal Regions and its Correlation with the Big Five Personality during Conceptual Expansion

对概念扩展神经机制的探讨日益成为创造性认知"过程式"研究视角下的热点。但以往研究未能排除评估效应对实验的影响,亦未考察过人格因素与任务态下神经活动的关系。实验向被试随机呈现高低扩展两类的报纸用途,要求被试认真思考"合理的操作方式",使报纸能够实现呈现的用途。同时对其进行f NIRS的兴趣区扫描,并在事后要求被试完成大五人格量表。结果发现,与低扩展条件相比,高扩展条件会引起颞叶区域(BA21/22)更大的激活,而额极(BA10)和背外侧前额皮层(BA9)的激活会显著降低;人格元特质可塑性与额极和眶额皮层的活动正相关。提示概念扩展过程中,可能需要颞叶脑区激活与前额脑区去激活的协同作用,且该过程与人格因素存在相关关系。

The study of the neural mechanism of Conceptual expansion has become a hotspot from a research perspective of crearive cognitive ＂ process＂ approach. However,previous studies have failed to exclude the influence of evaluate effort on experiments. And no studies investigated whether brain activity during performing creative task is also relevant to personality. Here, participants were asked to view a use and to think out the reasonable connection, the reasonable operational way that can make paper implement the use, between the use and paper. According to material pre-experiment, the uses were separated into high-unusual and low-usual ones in advance. The prefrontal and temporal activities were recorded by functional near-infrared spectroscopy （fNIRS） during the experiment. To explore the correlations between neural activity related to conceptual expansion and personality, participants were asked to complete the Big Five Inventory. Results found decreased activity in dorsolateral prefrontal cortex （BA9, involved in default mode network） and frontopolar area （BA10） and increased activity in temporal regions （BA21, BA22） in the high as compared to the low expansion condition. In addition, personal meta-trait plasticity （including openness and extraversion） of Big Five Inventory was positively associated with activity in frontopolar areas and right orbitofrontal areas. Taken together, the findings indicate that temporal regions and prefrontal brain is involved in conceptual expansion and personal factors are related to frontal areas during performing creative expansion task.