Journal ArticleDOI
Occipital cortical neurons with transient pyramidal tract axons extend and maintain collaterals to subcortical but not intracortical targets.
TLDR
It is found, by using retrogradely transported fluorescent dyes as either short-term or long-term markers, that occipital cortical neurons which had transiently extended pyramidal tract axons maintain subcortical axonal connections to either the superior colliculus or the pons, and, at least in the case of the corticotectal projection, that the maintained collateral is present prior to the elimination of the transient pyramid tract collateral.About:
This article is published in Brain Research.The article was published on 1985-06-17. It has received 121 citations till now. The article focuses on the topics: Pyramidal tracts & Population.read more
Citations
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Journal ArticleDOI
Do cortical areas emerge from a protocortex
TL;DR: The adult mammalian neocortex consists of numerous 'areas' distinguished from one another largely on the basis of distinctions in cytoarchitecture and connections, but the developing neocortex lacks many of these area-specific distinctions, and is more uniform across its extent.
Book
Progress in Sensory Physiology
David Ottoson,Hansjochem Autrum +1 more
TL;DR: Plasticity in the Peripheral Somatosensory Nerve System and the Spinal Dorsal Horn (with Notes on Homologous Regions of the Trigeminal Nuclei).
Journal ArticleDOI
Development of projection neuron types, axon pathways, and patterned connections of the mammalian cortex
TL;DR: The mammalian neocortex processes visual, auditory, and somatic sensation, giving rise to perception and initiating voluntary motor responses, through an intricate set of neural circuits within the neocortex.
Journal ArticleDOI
Cortical axons branch to multiple subcortical targets by interstitial axon budding: Implications for target recognition and “waiting periods”
TL;DR: The corticopontine projection develops by an interstitial budding of collaterals from parent axons rather than a reported mechanism of axon branching, growth cone bifurcation, which is used regardless of whether the parent axon's postpontine segment is permanent or transient.
Journal ArticleDOI
Fates of visual cortical neurons in the ferret after isochronic and heterochronic transplantation
TL;DR: The experiments described here constitute an attempt to manipulate the fates of newly generated cortical neurons upon transplantation, with results that suggest the possibility that the commitment of a cell to a particular laminar position and set of connections may occur very early on in cortical development.
References
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Journal ArticleDOI
Growth and reshaping of axons in the establishment of visual callosal connections
TL;DR: In kittens, but not in adults, callosal axons also reach other regions, but there they appear to be confined to the lowest part of layer VI, where they apparently enter the gray matter only in the restricted regions where they will also be found in adults.
Journal ArticleDOI
Cells of origin and terminal distribution of descending projections of the rat somatic sensory cortex
S. P. Wise,Edward G. Jones +1 more
TL;DR: The retrograde, horseradish peroxidase technique has been used to demonstrate the cells of origin of corticofugal fiber systems arising in the rat somatic sensory cortex and projecting to the striatum, diencephalon, brainstem, and spinal cord.
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The organization and postnatal development of the commissural projection of the rat somatic sensory cortex.
S. P. Wise,Edward G. Jones +1 more
TL;DR: Anterograde and retrograde tracing experiments have been used to demonstrate the origin and terminal distribution of commissural fibers in the first somatosensory cortex of the rat.
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Two new fluorescent retrograde neuronal tracers which are transported over long distances
TL;DR: Two new fluorescent retrograde neuronal tracers are reported: Nuclear Yellow (Hoechst S 769121), which mainly labels the neuronal nucleus; and Fast Blue (diamidino compound 253/50, which mainlylabel the neuronal cytoplasm), which seem to be transported effectively over long distances in rat and cat.
Journal ArticleDOI
Selective collateral elimination in early postnatal development restricts cortical distribution of rat pyramidal tract neurones.
TL;DR: The distribution of the neurones of origin of the pyramidal tract during the postnatal development of the rat neocortex using the recently introduced retrogradely transported fluorescent marker, True blue, indicates that the elimination of axon collaterals may be a general feature of the development of cortical projection systems, and that such transitory collateral may traverse considerable distances.