Abstract

Evidence is accumulating that nervous hypothalamic centres may regulate the rate of secretion of corticotrophin. Electrolytic lesions of different parts of the posterior hypothalamus appears to inhibit the release of this hormone (Harris & de Groot, 1950; Hume & Wittenstein, 1950; Porter, 1954; McCann, 1953; Ganong & Hume, 1954; Laqueur et al., 1953). The experiments of Harris & Jacobsohn (1952) and of Jacobsohn (1954) on animals bearing pituitary transplants, the results of Guillemin (1955), Saffran et al. (1955), Porter & Jones (1956) and Porter & Rumsfeld (1956) strongly suggest that a neurohumoral substance from hypothalamic origin is of significance for the secretion of corticotrophin.

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