Osmotic and hormonal stimulation of the third ventricular region of ducks

Antidiuretic, circulatory and local neuronal responses

C. Simon-Oppermann, Kazuyuki Kanosue, O. Gunther, H. Schmid

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

By means of local microperfusion of the 3rd cerebral ventricle, antidiuretic and circulatory responses to stimulations with various hypertonic solutions and norepinephrine were analyzed in conscious ducks. The results suggest ionic rather than osmometric responsiveness of periventricular osmoreceptive elements, which is in line with single unit recordings of periventricular neurons tested in vitro for their osmoresponsiveness. These neurons were located subependymally at the site of greatest responsiveness in vivo, and corresponded to morphologically identified neurons projecting to the neuroendocrine hypothalamo-pituitary system. Antidiuresis was combined with increases in arterial pressure and heart rate in response to hypertonic stimulations with monovalent cations; divalent cations produced long-lasting antidiuresis and equivocal circulatory responses. Norepinephrine elicited antidiuresis which was accompanied by arterial hypotension and bradycardia. Osmotically and norepinephrine induced antidiuresis was combined with increases of plasma ADH concentration. Different modulatory actions of intrinsic adrenergic, angiotensinergic and vasotocinergic neurons are suggested in hypothalamic control of autonomic functions.

Original languageEnglish
Pages (from-to)131-140
Number of pages10
JournalActa Physiologica Scandinavica, Supplement
Volume136
Issue number583
Publication statusPublished - 1989
Externally publishedYes

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Ducks
Neurons
Norepinephrine
Hypertonic Solutions
Monovalent Cations
Cerebral Ventricles
Third Ventricle
Divalent Cations
Bradycardia
Adrenergic Agents
Hypotension
Arterial Pressure
Heart Rate

ASJC Scopus subject areas

  • Physiology

Cite this

Osmotic and hormonal stimulation of the third ventricular region of ducks : Antidiuretic, circulatory and local neuronal responses. / Simon-Oppermann, C.; Kanosue, Kazuyuki; Gunther, O.; Schmid, H.

In: Acta Physiologica Scandinavica, Supplement, Vol. 136, No. 583, 1989, p. 131-140.

Research output: Contribution to journalArticle

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