ACTIVATION OF HUMAN HIPPOCAMPAL-FORMATION DURING MEMORY FOR FACES - A PET STUDY

ACTIVATION OF HUMAN HIPPOCAMPAL-FORMATION DURING MEMORY FOR FACES - A PET STUDY
复制标题

DOI：
10.1016/s0010-9452(13)80108-6
复制
发表时间：
1995-03-01
期刊：
CORTEX
影响因子：
3.6
通讯作者：
FRACKOWIAK, RSJ
FRACKOWIAK, RSJ
中科院分区：
心理学2区
文献类型：
--
作者：
KAPUR, N;FRISTON, KJ;FRACKOWIAK, RSJ

文献摘要

被引文献

相似文献

使用正电子发射断层扫描，我们研究了人类受试者的脑血流变化，同时从事面部刺激的视觉处理。一个任务需要顺行记忆的面孔进行了比较，涉及简单的性别分类控制任务-被认为是一个自动的过程，不需要任何显着的记忆组件。第二个任务要求识别著名政治家的面孔，因此涉及长期的“语义”记忆，也与控制任务进行了对比。为了确定与面部主要视觉处理相关的大脑区域，我们将所有任务与闭着眼睛扫描的对照人群进行了比较。我们的研究结果表明：（1）除了纹状皮质外，双侧舌/梭状回和右侧海马旁回参与了面部的初级视觉处理;（2）左侧海马回参与了两种类型的记忆;（3）在长期“语义”记忆中，顶下小叶的局部脑血流量相对减少。此外，这两种记忆任务都导致了左侧上级颞叶皮层的脑血流受到抑制。我们的结论是，右海马区参与了很大程度上是自动的，主要处理的面孔，而左海马区还参与时，需要外显记忆的面孔。
Using positron emission tomography, we examined cerebral blood flow changes in human subjects whilst engaged in the visual processing of face stimuli. A task requiring anterograde memory of faces was compared with a control task involving simple gender classification - considered an automatic process that did not require any significant memory component. A second task requiring recognition of famous politicians' faces, and therefore involving long-term ''semantic'' memory, was also contrasted with the control task. To identify brain regions associated with primary visual processing of the face we compared all tasks against a control population scanned with eyes closed. Our results indicate - (1) The involvement of bilateral lingual/fusiform gyri and the right parahippocampal gyrus in addition to striate cortex in primary visual processing of the face; (2) the involvement of the left hippocampal gyrus in both types of memory; (3) a relative decrease in local cerebral blood flow in the inferior parietal lobules in long-term ''semantic'' memory. In addition, both memory tasks resulted in a suppression of cerebral blood flow in the left superior temporal cortex. We conclude that right hippocampal regions are involved in a largely automatic, primary processing of faces, while left hippocampal regions are additionally involved when explicit memory for faces is required.