Bleich-Cohen Maya, Mintz Matti, Pianka Pazit, Andelman Fani, Rotshtein Pia, Hendler Talma
Department of Psychology and Faculty of Medicine, Tel-Aviv University Functional Brain Imaging Unit, Wohl Institute for Advanced Imaging, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel.
Neuroreport. 2006 Sep 18;17(13):1391-5. doi: 10.1097/01.wnr.0000215772.68979.f4.
Whether the amygdala responds in a stimulus- or a task-specific way, and how it corresponds to such effects in sensory cortices is dubious. Eighteen volunteers participated in a functional magnetic resonance imaging study in which they were asked to identify either emotion or gender in visually presented scenes, faces, and sentences. Amygdala and the lateral occipital complex showed similar stimulus effect with greater activation to scenes than to faces and sentences, whereas the superior temporal complex responded preferentially to sentences. No task effect was observed in the amygdala, whereas lateral occipital complex and superior temporal complex showed left lateralized selectivity to the emotional task. These results suggest that the amygdala is more sensitive to stimulus than explicit task parameters when processing emotion.
杏仁核是以刺激特异性还是任务特异性的方式做出反应，以及它如何与感觉皮层中的此类效应相对应，这一点尚不确定。18名志愿者参与了一项功能磁共振成像研究，在该研究中，他们被要求从视觉呈现的场景、面孔和句子中识别情绪或性别。杏仁核和枕外侧复合体表现出相似的刺激效应，对场景的激活大于对面孔和句子的激活，而颞上复合体则优先对句子做出反应。在杏仁核中未观察到任务效应，而枕外侧复合体和颞上复合体对情感任务表现出左侧化选择性。这些结果表明，在处理情绪时，杏仁核对刺激比对明确的任务参数更敏感。
