Can visual information encoded in cortical columns be decoded from magnetoencephalography data in humans?

被引：54

作者：

Cichy, Radoslaw Martin ^{[1
]}

Ramirez, Fernando Mario ^{[2
]}

Pantazis, Dimitrios ^{[3
]}

机构：

[1] MIT, Comp Sci & Artificial Intelligence Lab, Cambridge, MA 02139 USA

[2] Bernstein Ctr Computat Neurosci, Berlin, Germany

[3] MIT, McGovern Inst Brain Res, Cambridge, MA 02139 USA

来源：

NEUROIMAGE | 2015年 / 121卷

基金：

美国国家科学基金会;

关键词：

Orientation encoding; Magnetoencephalography; Multivariate pattern analysis; Cortical columns; LATERAL GENICULATE-NUCLEUS; RECEPTIVE-FIELDS; ORIENTATION SELECTIVITY; VERTICAL ORIENTATION; OBJECT RECOGNITION; NEURAL BASIS; ACTIVATION; CORTEX; SPACE; INTERFERENCE;

D O I：

10.1016/j.neuroimage.2015.07.011

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

It is a principal open question whether noninvasive imaging methods in humans can decode information encoded at a spatial scale as fine as the basic functional unit of cortex: cortical columns. We addressed this question in five magnetoencephalography (MEG) experiments by investigating a columnar-level encoded visual feature: contrast edge orientation. We found that MEG signals contained orientation-specific information as early as approximately 50 ms after stimulus onset even when controlling for confounds, such as overrepresentation of particular orientations, stimulus edge interactions, and global form-related signals. Theoretical modeling confirmed the plausibility of this empirical result. An essential consequence of our results is that information encoded in the human brain at the level of cortical columns should in general be accessible by multivariate analysis of electrophysiological signals. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：193 / 204

页数：12

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