Summary
The occurrence and distribution of biogenic amines in the brain of Rana temporaria tadpoles have been investigated with the fluorescence-microscope. From the embryonic developmental stage 20 onwards catecholamine-containing cell bodies are shown to be present in the nucleus reticularis mesencephali, the tuber cinereum and the olfactory bulb, and from stage 22 onwards also within the dorsolateral areas of the medulla oblongata and within the preoptic area. Catecholamine-containing enlargements of nerve fibres occur in the ventrolateral parts of the medulla oblongata and the midbrain, in an area lateral to the hypothalamic organon vasculosum, within the region of the medial forebrain bundle and within the striatum, in all stages following stage 20. These enlargements also occur in the median eminence and the pars intermedia of the hypophysis, in the commissura transversa (up to stage 26), in the commissura anterior (also up to stage 26) and in the pars ventrolateralis nuclei lateralis septi in all stages after 22. From the same stage onwards a second area of green fluorescent varicosities can be demonstrated within the striatum. After stage 26 catecholamine-containing enlargements of nerve fibres additionally are to be found in the dorsolateral part of the lateral septal nucleus.
After appearing at stage 22 5-HT-containing, yellow fluorescent perikarya are to be observed within the nucleus raphes and its neighbourhood, and yellow fluorescent varicosities in the interpeduncular nucleus and in an area between the medial and the lateral septal nucleus.
Zusammenfassung
Vorkommen und Verteilung biogener Amine im Gehirn von Rana temporaria-Kaulquappen wurden fluoreszenzmikroskopisch untersucht. Catecholaminhaltige Perikaryen erscheinen ab Stadium 20 im Nucleus reticularis mesencephali, im Tuber cinereum und im Bulbus olfactorius, ab Stadium 22 in den Flügelplatten der Medulla oblongata und in der Area praeoptica. Ab Entwicklungsstufe 20 zeigen sich ventrolateral in Medulla oblongata und Mittelhirn, lateral vom Organon vasculosum hypothalami, im Bereich des medialen Vorderhirnbündels und im Striatum catecholaminhaltige Faseranschwellungen, ab Stadium 22 außerdem in der Eminentia mediana und dem Hypophysenzwischenlappen, in der Commissura transversa (bis zur Stufe 26), in der Commissura anterior (bis zur Stufe 26) und in der Pars ventrolateralis nuclei lateralis septi. Im Striatum ist von dieser Entwicklungsstufe an ein zweites Areal mit grün fluoreszierenden Varikositäten nachweisbar. Ab Stadium 26 finden sich auch in der Pars dorsolateralis des lateralen Septumkerns catecholaminhaltige Faseranschwellungen.
Ab Entwicklungsstufe 22 sind 5-HT-haltige, gelb fluoreszierende Perikaryen im Nucleus raphes und in seiner Umgebung zu beobachten, gelb fluoreszierende Varikositäten im Nucleus interpeduncularis und zwischen medialem und lateralem Septumkern.
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Herrn Professor Dr. med. W. Bargmann zum 65. Geburtstag gewidmet.
Mit dankenswerter Unterstützung durch die Deutsche Forschungsgemeinschaft.
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Bartels, W. Die Ontogenese der aminhaltigen Neuronensysteme im Gehirn von Rana temporaria . Z. Zellforsch. 116, 94–118 (1971). https://doi.org/10.1007/BF00332860
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DOI: https://doi.org/10.1007/BF00332860