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

R. J. D'Amato, M. E. Blue, B. L. Largent, D. R. Lynch, D. J. Ledbetter, M. E. Molliver, S. H. Snyder

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)4322-4326
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume84
Issue number12
DOIs
StatePublished - 1987

ASJC Scopus subject areas

  • General

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