title: Ontogeny of the serotonergic projection to rat neocortex: transient expression of a dense innervation to primary sensory areas.
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.
authors.forename: R J
authors.initials: RJ
authors.lastname: D'Amato
authors.forename: M E
authors.initials: ME
authors.lastname: Blue
authors.forename: B L
authors.initials: BL
authors.lastname: Largent
authors.forename: D R
authors.initials: DR
authors.lastname: Lynch
authors.forename: D J
authors.initials: DJ
authors.lastname: Ledbetter
authors.forename: M E
authors.initials: ME
authors.lastname: Molliver
authors.forename: S H
authors.initials: SH
authors.lastname: Snyder
mesh_terms: D000375:Aging; D000818:Animals; D001345:Autoradiography; D002540:Cerebral Cortex / Q000254:growth & development* / Q000378:metabolism; D015283:Citalopram; D008297:Male; D011437:Propylamines / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains; D011985:Receptors, Serotonin / Q000378:metabolism*; D012701:Serotonin / Q000378:metabolism*; D012702:Serotonin Antagonists / Q000378:metabolism; D014316:Tritium
chemical_list: D011437:Propylamines; D011985:Receptors, Serotonin; D012702:Serotonin Antagonists; D015283:Citalopram; D014316:Tritium; D012701:Serotonin