Using FMRI brain activation to identify cognitive states associated with perception of tools and dwellings.
Using FMRI brain activation to identify cognitive states associated with perception of tools and dwellings.
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DOI：
10.1371/journal.pone.0001394
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发表时间：
2008-01-02
期刊：
影响因子：
3.7
通讯作者：
Just MA
中科院分区：
文献类型：
--
作者：
Shinkareva SV;Mason RA;Malave VL;Wang W;Mitchell TM;Just MA
以前的研究已经成功地识别出了与一组描述的类别（如工具）的感知相对应的认知状态，通过分析伴随的大脑活动模式，用功能磁共振成像测量。目前的研究集中在识别与4s观看单个线条画（10个熟悉的物体中的1个，5个工具和5个住所，如锤子或城堡）相关的认知状态。在这里，我们展示了以下能力：（1）根据参与者的特征性全脑神经激活模式（不包括视觉区域），识别参与者正在观看的10幅图画中的哪一幅;（2）根据参与者的激活，以更高的准确度识别物体的类别;以及（3）仅基于其他参与者的激活模式，第一次识别参与者正在观看的各个对象和对象的类别。对类别识别很重要的体素在参与者中的位置相似，分布在整个皮层，集中在腹侧颞感知区，但也包括更多的额叶关联区（有点偏左）。这些发现表明存在稳定的，分布式的，公共的，可识别的神经状态对应于对象的概念。
Previous studies have succeeded in identifying the cognitive state corresponding to the perception of a set of depicted categories, such as tools, by analyzing the accompanying pattern of brain activity, measured with fMRI. The current research focused on identifying the cognitive state associated with a 4s viewing of an individual line drawing (1 of 10 familiar objects, 5 tools and 5 dwellings, such as a hammer or a castle). Here we demonstrate the ability to reliably (1) identify which of the 10 drawings a participant was viewing, based on that participant's characteristic whole-brain neural activation patterns, excluding visual areas; (2) identify the category of the object with even higher accuracy, based on that participant's activation; and (3) identify, for the first time, both individual objects and the category of the object the participant was viewing, based only on other participants' activation patterns. The voxels important for category identification were located similarly across participants, and distributed throughout the cortex, focused in ventral temporal perceptual areas but also including more frontal association areas (and somewhat left-lateralized). These findings indicate the presence of stable, distributed, communal, and identifiable neural states corresponding to object concepts.
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