Liquorkontaktneurone im Nucleus infundibularis

Translated title of the contribution: Liquor contacting neurons in the infundibular nucleus

I. Vigh-Teichmann, B. Vigh, S. Koritsánszky, B. Aros

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The infundibular nucleus of various reptiles was studied light and electron microscopically. Cells of this nucleus send processes through a stratified ependyma into the 3rd ventricle where they form free, intraventricular nerve terminals ("liquor contacting nerve endings", LCNE). In the nucleus, two kinds of neurons could be distinguished light microscopically: a) small, AChE-negative, toluidine blue neurons, and b) large, AChE-positive cells staining light with toluidine blue. The club shaped LCNE contain elements of the endoplasmic reticulum, free ribosomes, a various amount of mitochondria, and single lysosomes. The terminals bear asymmetrical cilia (type 9+0) supplied with accessory basal bodies and rootlet fibres. Two kinds of LCNE are demonstrable: a) LCNE containing dense-core vesicles with a diameter of about 800-1100 Å, and b) LCNE with large, electron-dense granules (diameter about 1,200-1,600 Å). In the lumen of the 3rd ventricle, there occur small axons that contain small granulated vesicles (diameter about 700-900 Å), and that form intraventricular synapses with the LCNE of the infundibular nucleus. The perikarya of the infundibular nucleus contain an abundant endoplasmic reticulum, numerous polyribosomes, neurotubules and mitochondria. Similarly to the LCNE, two kinds of perikarya can be distinguished: a) perikarya containing granulated vesicles (diameter about 800-1100 Å), and b) perikarya with electron-dense granules (diameter about 1200-1700 Å). Furthermore, different types of axosomatic and axodendritic synapses occur. The function of the intraventricular nerve terminals and the different types of synapses in the nucleus is discussed with regard to an exchange of informations between the cerebrospinal fluid and the infundibular nucleus.

Translated title of the contributionLiquor contacting neurons in the infundibular nucleus
Original languageGerman
Pages (from-to)17-34
Number of pages18
JournalZeitschrift für Zellforschung und mikroskopische Anatomie
Volume108
Issue number1
DOIs
Publication statusPublished - Mar 1 1970

Keywords

  • Liquor contacting neurons
  • Nucleus infundibularis
  • Reptiles
  • Ultrastructure

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

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