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

被引:171
作者
KAPUR, N
FRISTON, KJ
YOUNG, A
FRITH, CD
FRACKOWIAK, RSJ
机构
[1] WESSEX NEUROL CTR, SOUTHAMPTON, HANTS, ENGLAND
[2] HAMMERSMITH HOSP, MRC, CYCLOTRON UNIT, LONDON W12 0HS, ENGLAND
[3] APPL PSYCHOL UNIT, CAMBRIDGE, ENGLAND
[4] UCL, DEPT PSYCHOL, LONDON, ENGLAND
关键词
D O I
10.1016/S0010-9452(13)80108-6
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
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.
引用
收藏
页码:99 / 108
页数:10
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