CZ:Ref:DOI:10.1093/brain/103.2.221: Difference between revisions

Latest revision as of 12:10, 13 January 2009

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

"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."
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
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.

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 :A well-cited paper concluding that
-#"The intrinsic structure of the [[neocortex]] is basically more uniform than has been thought and that differences in [[cytoarchitecture]] and function reflect differences in [[cortical connectivity|connections]]."
+#"the intrinsic structure of the [[neocortex]] is basically more uniform than has been thought and that differences in [[cytoarchitecture]] and function reflect differences in [[cortical connectivity|connections]]."
-#The [[cerebral cortex]] is organized in columns
+#The [[cerebral cortex]] is organized in columns which are commonly referred to (in a wide variety of contexts) as [[cortical columns]], though ''ontogentic columns'' ([[CZ:Ref:Rakic 1988 Specification of cerebral cortical areas|Rakic 1988]]) would be more precise
 #The number of [[neuron]]s underneath equally sized patches of [[cerebral cortex|cortical]] [[surface area]] is approximately identical (around 147,000 per <math>mm^2</math>) across [[mammal]]ian species, with the exception of the [[primary visual cortex]] in [[primate]]s.
 :Point number 3 has been refuted by a number of studies (e.g. [[CZ:Ref:Herculano-Houzel 2008 The basic nonuniformity of the cerebral cortex|Herculano-Houzel et al., 2008]]; see also references therein), as summarized by [[CZ:Ref:Rakic 2008 Confusing cortical columns|Rakic 2008]].