Interference and facilitation effects during selective attention: An (H2O)-O-15 PET study of Stroop task performance
Interference and facilitation effects during selective attention: An (H2O)-O-15 PET study of Stroop task performance
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DOI：
10.1006/nimg.1995.1034
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发表时间：
1995-12-01
期刊：
影响因子：
5.7
通讯作者：
Cohen, JD
中科院分区：
文献类型：
--
作者：
Carter, CS;Mintun, M;Cohen, JD
为了探讨选择性注意过程中干扰和易化的功能解剖，我们采用（H2O）-O-15正电子发射断层扫描技术和计算机呈现的单次Stroop认知激活任务对15名正常受试者进行了研究。在先前与选择性注意相关的结构网络中观察到局部脑血流量（rCBF）增加，包括前扣带回，额极皮质，顶下小叶和丘脑以及舌回。此外，在外侧纹外皮质中观察到rCBF降低（与对照状态相比）。前额叶和纹外区的rCBF变化不同的差异，需要调制的影响，文字和颜色的信息，而受试者作出反应，无论是不一致的或一致的Stroop刺激。这些结果表明，Stroop程序的效用，调查选择性注意的功能解剖，鉴于最近的兴趣有关的作用，前扣带回的神经精神疾病的病理生理学，我们的研究结果还表明，Stroop任务可以作为一个可靠的神经行为探针，该地区。这些结果的意义，为理解选择性注意的处理机制进行了讨论的框架内的Stroop任务性能的并行分布式处理模型。(C)出版社：Academic Press
To investigate the functional anatomy of interference and facilitation during selective attention, we studied 15 normal subjects using the (H2O)-O-15 positron emission tomography technique and a computer presented single-trial Stroop task for cognitive activation. Increases in regional cerebral blood flow (rCBF) were observed in a network of structures that have been previously associated with selective attention, including the anterior cingulate gyrus, the frontal polar cortex, the inferior parietal lobule, and the thalamus, as well as the lingual gyrus. Furthermore rCBF decreases (compared to control states) were observed in lateral extra-striate cortex. rCBF changes in prefrontal and extra-striate regions varied with differences in the need to modulate the influence of word and color information while subjects responded to either incongruent or congruent Stroop stimuli. These results indicate the utility of Stroop procedures for investigating the functional anatomy of selective attention, Given recent interest regarding the role of the anterior cingulate gyrus in the pathophysiology of neuropsychiatric disorders, our results also suggest that the Stroop task can serve as a reliable neurobehavioral probe for this region. The significance of these results for understanding processing mechanisms underlying selective attention is discussed within the framework of a parallel distributed processing model of Stroop task performance. (C) 1995 Academic Press, Inc.