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Neocortex
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===Cortical columns=== [[File:Cortical Minicolumn.png|thumb|315x315px|The column is often thought of as the basic repeating functional unit of the neocortex. Neurons are color-coded by their layer: Layer II/III (green), Layer IV (purple), Layer V (red), Layer VI (yellow). ]] The neocortex is often described as being arranged in vertical structures called [[cortical columns]], patches of neocortex with a diameter of roughly 0.5 mm (and a depth of 2 mm, i.e., spanning all six layers). These columns are often thought of as the basic repeating functional units of the neocortex, but their many definitions, in terms of anatomy, size, or function, are generally not consistent with each other, leading to a lack of consensus regarding their structure or function or even whether it makes sense to try to understand the neocortex in terms of columns.<ref name="Horton 2005">{{cite journal | vauthors = Horton JC, Adams DL | title = The cortical column: a structure without a function | journal = Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences | volume = 360 | issue = 1456 | pages = 837β62 | date = April 2005 | pmid = 15937015 | pmc = 1569491 | doi = 10.1098/rstb.2005.1623 }}</ref>
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