The innervation and actions of the neurophypophysis; an investigation using the method of remote-control stimulation

Abstract

Abstract Remote-control stimulation has been applied to the hypothalamo-hypophysial region. Rabbits showed no ill-effects from the presence of the implanted unit for periods up to three years. Stimulation of the neurohypophysis in the conscious rabbit has been shown to cause: (a) inhibition of a water diuresis; (b) increase in urinary chlorides; (c) no change in the level of the blood sugar; (d) marked increase in the activity of the oestrous and oestrogenized uterus, whilst little effect was observed on the activity of the anoestrous or pseudo-pregnant uterus, or on the organ under the influence of progesterone. The anti-diuretic, chloruretic and oxytocic effects could be duplicated by intravenous injection of posterior lobe extracts. Stimulation caused a secretion which possessed less anti-diuretic than oxytocic activity, as compared with various posterior lobe extracts.

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