Comparing the brain areas supporting nondeclarative categorization and recognition memory
Comparing the brain areas supporting nondeclarative categorization and recognition memory
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DOI：
10.1016/s0926-6410(02)00122-2
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发表时间：
2002-08-01
期刊：
影响因子：
--
通讯作者：
Buxton, RB
中科院分区：
文献类型：
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作者：
Reber, PJ;Wong, EC;Buxton, RB
健康志愿者的功能性磁共振成像（fMRI），识别和对比与非陈述性分类和识别记忆相关的脑区。在两组不同的参与者（每组n=5）中，将点模式分类和识别期间的活动与控制任务（计数点）进行比较。与非陈述性分类相关的区域网络包括双侧下前额叶和顶叶皮层区域，这些区域在其他几项分类研究中也有牵连。在识别过程中，后部视觉区域、楔前叶、后扣带回和右前额皮质的活动增加。以一般控制条件为参照，对比再认和分类，发现再认引起后早期视皮层、楔前叶、右内侧颞叶和右背外侧前额叶皮层更多的活动。先前的研究通过比较分类和非分类刺激诱发的活动，暗示了学习点模式类别时视觉表征的变化[23，24]。目前的研究结果支持这些结果，并进一步确定了在分类过程中参与表达这一类别知识的大脑区域。(C)2002 Elsevier Science B.V.保留所有权利。
Brain areas associated with both nondeclarative categorization and recognition memory were identified and contrasted using functional magnetic resonance imaging (fMRI) of healthy volunteers. Activity during dot-pattern categorization and recognition were compared with a control task (counting dots) in two separate groups of participants (n=5 each). The network of areas associated with nondeclarative categorization was found to include bilateral inferior prefrontal and parietal cortical areas that have been implicated in several other studies of categorization. During recognition, increased activity was found in posterior visual areas, the precuneus, posterior cingulate and right prefrontal cortex. Using the common control condition as a reference, recognition and categorization were contrasted and recognition was found to evoke more activity in posterior early visual cortex, the precuneus, right medial temporal lobe and right dorso-lateral prefrontal cortex. Previous research has implicated changes in visual representation in learning a category of dot-pattern [23,24] by comparing activity evoked by categorical and non-categorical stimuli. The current findings support those results and additionally identify brain areas active during categorization that are involved in expressing this category knowledge. (C) 2002 Elsevier Science B.V. All rights reserved.