Donaldson D I, Petersen S E, Buckner R L
Department of Psychology, University of Stirling, Stirling, United Kingdom.
Neuron. 2001 Sep 27;31(6):1047-59. doi: 10.1016/s0896-6273(01)00429-9.
We employed event-related fMRI to constrain cognitive accounts of memory retrieval. Studies of explicit retrieval reveal that lateral and medial parietal, dorsal middle frontal gyrus, and anterior prefrontal cortex respond more for studied than new words, reflecting a correlate of "retrieval success." Studies of implicit memory suggest left temporal cortex, ventral and dorsal inferior frontal gyrus respond less for studied than new words, reflecting a correlate of "conceptual priming." In the present study, responses for old and new items were compared during performance on explicit recognition (old/new judgement) and semantic (abstract/concrete judgement) tasks. Regions associated with priming were only modulated during the semantic task, whereas regions associated with retrieval success were modulated during both tasks. These findings constrain functional-anatomic accounts of the networks, suggesting that processes associated with priming do not support explicit recognition judgments.
我们采用事件相关功能磁共振成像来限制记忆检索的认知解释。对显性检索的研究表明，外侧和内侧顶叶、背侧额中回以及前额叶前部皮层对学过的单词的反应比对新单词的反应更强烈，这反映了“检索成功”的一种关联。对隐性记忆的研究表明，左颞叶皮层、腹侧和背侧额下回对学过的单词的反应比对新单词的反应更弱，这反映了“概念启动”的一种关联。在本研究中，在进行显性识别（旧/新判断）和语义（抽象/具体判断）任务时，比较了对旧项目和新项目的反应。与启动相关的区域仅在语义任务期间受到调节，而与检索成功相关的区域在两个任务期间均受到调节。这些发现限制了对这些网络的功能解剖学解释，表明与启动相关的过程不支持显性识别判断。
