Secretory phenomena at the ependyma of the IIIrd ventricle of the embryonic rat.

Anatomy and Embryology
K H Booz

Abstract

On the basis of previous observations of the third ventricle, the brains of rat embryos in the 17 to 21 gestation days were examined by light- and electron microscope as well as histochemically. Following results were obtained: 1. Between the 18th and 20th gestation days supraependymal secretion spherules and intraventricular secretion masses were observed in the rostral part of the third ventricular lumen. The intraventricular structures are not demonstrable with neurosecretory stains; they are PAS-negative and do not stain with periodic-acid-bisulfite-aldehydethionine. All histochemical reactions performed were negative. 2. The morphological finding in the same frontal plane is not uniform. Dorso-ventral difference exist between one ependymal region which lies caudal to the subfornical organ and an area in the same plane which is situated further ventrally near the entrance to the foramina Monroi (Fig. 1 a). In the superior portion, the supraependymal structures are spherical or bottle-shaped formations and are easily definable. In the lower ventricular portion densely situated ependymal protrusions are seen which become sperical only in the ventricular lumen. 3. In both instances (the spherical and flask-shaped protrusions o...Continue Reading

References

Jan 1, 1974·Cell and Tissue Research·L NicanderM Larsson
Jan 1, 1968·Zeitschrift für Zellforschung und mikroskopische Anatomie·H Braak
Jan 1, 1967·Zeitschrift für Zellforschung und mikroskopische Anatomie·P Röhlich, B Vigh
Nov 1, 1953·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·A G E PEARSE
May 25, 1959·The Journal of Biophysical and Biochemical Cytology·S L PALAY, L J KARLIN
Jul 1, 1948·Stain Technology·J F A McMANUS

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Citations

Sep 20, 1976·Cell and Tissue Research·M Whitear
May 20, 1998·Anatomia, histologia, embryologia·V Rajtová, J Kacmárik
Jan 1, 1989·Journal of Pineal Research·M G WelshM D Rollag
Aug 1, 1977·The American Journal of Anatomy·R S Hannah, W Geber
Mar 10, 2001·Microscopy Research and Technique·F Nualart, S Hein

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