ヤツメウナギ類およびシロウオの視床下部におけるモノアミン類の組織化学的検索

概要

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Histochemical examination by means of fluorescence microscope was performed in order to ascertain the distribution of monoamines in the hypothalamus of two widely separated groups, i.e., two species of the lampreys and the ice-goby, from phylogenetic and ontogenetic points of view. In the brains of both mature river and adult brook lampreys, the fluorescent area was disclosed around the recessus posterior, which further extends rostrally to the lateral wall of the neurohypophysial recessus, i.e., the recessus infundibuli. This fluorescence located in the periventricular area consisted of the cells appeared in the flame-bulb. By examination of the specimens treated with reserpin and sodium borohydride, the fluorescent substance contained in the cells of lamprey seemed to be the monoamines. The fluorescence is also recognized in the hypothalamic region of ice-goby, which might correspond to the nucleus recessus lateralis hypothalami and nucleus recessus posterioris hypothalami. No fluorescent cells and fibers were demonstrated in the hypophysis and hypothalamic neurosecretory cells of both lampreys and ice-goby.
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