Functional imaging of gustatory perception and imagery: "top-down" processing of gustatory signals
Functional imaging of gustatory perception and imagery: "top-down" processing of gustatory signals
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DOI：
10.1016/j.neuroimage.2004.08.002
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发表时间：
2004-12-01
期刊：
影响因子：
5.7
通讯作者：
Watanabe, Y
中科院分区：
文献类型：
--
作者：
Kobayashi, M;Takeda, M;Watanabe, Y
通过回忆味觉记忆，可以在没有味觉输入的情况下产生生动的味觉感知。这种味觉图像影响我们的味觉处理。然而，人类味觉知觉的“自上而下”调节机制仍不清楚。我们的研究结果提出了一个新的视角味觉加工的神经基础。虽然味觉意象和味觉知觉共享的神经基板的共同部分，有一个不对称的地形激活的大脑中：左半球主要是由味觉意象任务激活。此外，额中回和额上级回不被味觉激活，但它们参与了味觉幻觉的产生。额叶皮层中的这些区域可能介导从长期记忆中提取味觉信息的“自上而下”控制。(C)2004年爱思唯尔公司All rights reserved.
By recalling gustatory memories, it is possible to generate vivid gustatory perceptions in the absence of gustatory inputs. This gustatory image influences our gustatory processing. However, the mechanism of the "top-down" modulation of gustatory perception in the human is still unclear. Our findings propose a new perspective on the neural basis of gustatory processing. Although gustatory imagery and gustatory perception shared common parts of neural substrates, there was an asymmetrical topography of activation in the insula: the left insula was predominantly activated by gustatory imagery tasks. In addition, the middle and superior frontal gyri were not activated by gustatory perception but they participated in the generation of gustatory hallucinations. These regions in the frontal cortex may mediate the "top-down" control of retrieving gustatory information from the storage of long-term memories. (C) 2004 Elsevier Inc. All rights reserved.