左前额叶与趋近动机加工的关系

The Relationship between Left Frontal and Approach Motivation Process

在加工正性情绪时,前额叶左侧激活水平大于右侧,而正性情绪往往伴随着趋近动机。因此为了探索这种左前额叶相对激活现象反映的究竟是正性情绪加工还是趋近动机加工,文章总结了两个研究领域中的有关证据:来自特质或状态愤怒情绪与左前额叶相对激活关系的研究证据和来自身体姿势变化(包括整体姿势变化和单侧肌肉紧缩)对左前额叶相对激活影响的研究证据。前者的一致发现是:左前额叶参与加工由愤怒情绪引发的趋近动机。后者的一致发现是:不同的身体姿势能够改变左前额叶的相对激活水平。两个领域的研究证据汇聚起来证明左前额叶参与加工趋近动机。文章还指出了将来研究的注意事项和可能方向:精确定义回避型愤怒;探索愤怒情绪是否在加工晚期诱发趋近或回避动机;探索不同方式诱发的趋近动机是否在脑机制上存在差异。

The relative left frontal activation （RLFA） means the activity of the left frontal is larger than the right when process positive emotion, which may due to the process of positive valence or the process of approach motivation. For clear this question, paper collected associated evidence from two area of research：one was the area of the relationship between anger （include both state and trait） and RLFA, the other was the area of whether the change of the body posture （included both whole body posture change and the contraction of unilateral muscle） can affect the RLFA. The consistent finding of the former was the left frontal involves in the process of approach motivation. However, the latter found different body posture can change the relative activation level of left frontal. The left frontal involved in the process of approach motivation can be proofed by converging these two kinds of evidence. In addition, based on these evidence, we gave some suggestion for the future research： the meaning of avoiding anger should give a more clear definition; whether anger could induce a approach motivation during the later step of process should be explored; whether different ways induced approach motivation have a difference in the brain mechanism should be cleared.