Abstract：
: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.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Cichy RM,Ramirez FM,Pantazis Ddoi
10.1016/j.neuroimage.2015.07.011subject
Has Abstractpub_date
2015-11-01 00:00:00pages
193-204eissn
1053-8119issn
1095-9572pii
S1053-8119(15)00620-5journal_volume
121pub_type
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