Cortical column/Bibliography

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• Rakic, Pasko (2008), "Confusing cortical columns", Proceedings of the National Academy of Sciences 105 (34): 12099-12100, DOI:10.1073/pnas.0807271105 ^[e]

Provides a commentary on Herculano-Houzel et al. (2008) and Rockel at al. (1980), citing the former as a convincing (albeit not surprising) refutation of the latter in which the cortical architecture was assumed to be basically uniform within a brain and across mammalian species.

• Herculano-Houzel, S.; C.E. Collins & P. Wong et al. (2008), "The basic nonuniformity of the cerebral cortex", Proceedings of the National Academy of Sciences 105 (34): 12593-12598, DOI:10.1073/pnas.0805417105 ^[e]

Directly contradicts Rockel et al. (1980) by showing that the number of neurons per unit surface area of neocortex is not constant across mammals but instead varies about three-fold among primates.

• Rakic, P. (2007), "The radial edifice of cortical architecture: from neuronal silhouettes to genetic engineering", Brain Research Reviews 55: 204-219, DOI:10.1016/j.brainresrev.2007.02.010 ^[e]
• Horton, J.C. & D.L. Adams (2005), "The cortical column: a structure without a function", Philos Trans R Soc Lond B Biol Sci 360 (1456): 837–862, DOI:10.1098/rstb.2005.1623 ^[e]
• Rakic, P. (1988), "Specification of cerebral cortical areas", Science 241 (4862): 170–176, DOI:10.1126/science.3291116 ^[e]

Introduces the term ontogenetic column as an alternative to the ambiguous cortical column.

• Rockel, A. J.; R. W. Hiorns & T. P. S. Powell (1980), "The Basic Uniformity in Structure of the Neocortex", Brain 103 (2): 221–244, DOI:10.1093/brain/103.2.221 ^[e]

A well-cited paper concluding that

1. "the intrinsic structure of the neocortex is basically more uniform than has been thought and that differences in cytoarchitecture and function reflect differences in connections."
2. The cerebral cortex is organized in columns which are commonly referred to (in a wide variety of contexts) as cortical columns, though ontogentic columns (Rakic 1988) would be more precise
3. The number of neurons underneath equally sized patches of cortical surface area is approximately identical (around 147,000 per $mm^{2}$) across mammalian species, with the exception of the primary visual cortex in primates.

Point number 3 has been refuted by a number of studies (e.g. Herculano-Houzel et al., 2008; see also references therein), as summarized by Rakic 2008.

• Vernon Mountcastle (1978), "An Organizing Principle for Cerebral Function: The Unit Model and the Distributed System", The Mindful Brain (Gerald M. Edelman and Vernon B. Mountcastle, eds.) Cambridge, MA: MIT Press.