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Open AccessJournal ArticleDOI

Ontogeny of the serotonergic projection to rat neocortex: transient expression of a dense innervation to primary sensory areas.

TLDR
The development of serotonergic innervation to rat cerebral cortex was characterized by immunohistochemical localization of serotonin combined with autoradiographic imaging of serotonin-uptake sites and may exert a trophic influence on the development of cortical circuitry and thalamocortical connections.
Abstract
The development of serotonergic innervation to rat cerebral cortex was characterized by immunohistochemical localization of serotonin combined with autoradiographic imaging of serotonin-uptake sites. In neonatal rat, a transient, dense, serotonergic innervation appears in all primary sensory areas of cortex. In somatosensory cortex, dense patches of serotonergic innervation are aligned with specialized cellular aggregates called barrels. The dense patches are not apparent after 3 weeks of age, and the serotonergic innervation becomes more uniform in adult neocortex. This precocious neonatal serotonergic innervation may play a transient physiologic role in sensory areas of cortex or may exert a trophic influence on the development of cortical circuitry and thalamocortical connections.

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Citations
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The developmental role of serotonin: news from mouse molecular genetics

TL;DR: New genetic models that target the serotonin system show that transient alterations in serotonin homeostasis cause permanent changes to adult behaviour and modify the fine wiring of brain connections.
Journal ArticleDOI

Aggressive Behavior and Altered Amounts of Brain Serotonin and Norepinephrine in Mice Lacking MAOA

TL;DR: Pup behavioral alterations, including trembling, difficulty in righting, and fearfulness were reversed by the serotonin synthesis inhibitor parachlorophenylalanine, and adults manifested a distinct behavioral syndrome, including enhanced aggression in males.
Journal ArticleDOI

Developmental changes in brain serotonin synthesis capacity in autistic and nonautistic children.

TL;DR: The data suggest that humans undergo a period of high brain serotonin synthesis capacity during childhood, and that this developmental process is disrupted in autistic children.
References
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Journal ArticleDOI

A Dissertation ON

ErnestW. Hey Groves
- 28 Jan 1928 - 
TL;DR: In this article, the authors describe a system for the recognition of predefined situations in buildings, which is based on a hierarchy of symbols, which are also predefined, and use the perceived situations as basis for decision making in the interaction of the whole system with its environment.
Journal ArticleDOI

Evidence that the early postnatal restriction of the cells of origin of the callosal projection is due to the elimination of axonal collaterals rather than to the death of neurons

TL;DR: Using two fluorescent dyes that are retrogradely transported along axons, it is demonstrated that many of the neurons in the parietal region of the rat cerebral cortex that can be labeled from the contralateral hemisphere early in postnatal development, persist well beyond the period when the callosal projection normally becomes restricted.
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