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首页> 外文期刊>Neuron >Tracking the Mind's Image in the Brain I. Time-Resolved fMRI during Visuospatial Mental Imagery.
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Tracking the Mind's Image in the Brain I. Time-Resolved fMRI during Visuospatial Mental Imagery.

机译:跟踪大脑中的思维图像I.视觉空间心理成像过程中的时间分辨功能磁共振成像。

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摘要

Mental imagery, the generation and manipulation of mental representations in the absence of sensory stimulation, is a core element of numerous cognitive processes. We investigate the cortical mechanisms underlying imagery and spatial analysis in the visual domain using event-related functional magnetic resonance imaging during the mental clock task. The time-resolved analysis of cortical activation from auditory perception to motor response reveals a sequential activation of the left and right posterior parietal cortex, suggesting that these regions perform distinct functions in this imagery task. This is confirmed by a trial-by-trial analysis of correlations between reaction time and onset, width, and amplitude of the hemodynamic response. These findings pose neurophysiological constraints on cognitive models of mental imagery.
机译:在没有感觉刺激的情况下,心理意象(即心理表征的产生和操纵)是众多认知过程的核心要素。我们研究在心理时钟任务期间使用事件相关功能磁共振成像的视觉域中的图像和空间分析的皮层机制。从听觉到运动反应的皮质激活的时间分辨分析显示左后壁和右后顶叶皮层的顺序激活,表明这些区域在此成像任务中执行不同的功能。通过对反应时间与血液动力学反应的发作,宽度和幅度之间的相关性进行逐次试验分析,可以证实这一点。这些发现对心理意象的认知模型造成了神经生理上的限制。

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