Precise development of functional and anatomical columns in the neocortex - PubMed (original) (raw)
Comparative Study
. 2004 Jun 10;42(5):789-801.
doi: 10.1016/j.neuron.2004.05.002.
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- PMID: 15182718
- DOI: 10.1016/j.neuron.2004.05.002
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Comparative Study
Precise development of functional and anatomical columns in the neocortex
Ingrid Bureau et al. Neuron. 2004.
Free article
Abstract
Sensory cortex is ordered into columns, each tuned to a subset of peripheral stimuli. To identify the principles underlying the construction of columnar architecture, we monitored the development of circuits in the rat barrel cortex, using laser-scanning photostimulation analysis of synaptic connectivity, reconstructions of axonal arbors, and in vivo whole-cell recording. Circuits impinging onto layer 2/3 neurons from layers 4 and 2/3 developed in a monotonic, precise progression, with little evidence for transient hyperinnervation at the level of cortical columns. Consistent with this, synaptic currents measured in layer 2/3 neurons at PND 8, just after these neurons ceased to migrate, revealed already spatially well-tuned receptive fields.
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