Adrenal cortical innervation and glucocorticoid secretion

in Journal of Endocrinology
Author:
B. G. Charlton
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Introduction

It is generally considered that adrenocorticotrophin (ACTH) is the only important factor controlling glucocorticoid secretion from the adrenal (suprarenal) cortex. However, there is actually a considerable body of evidence to suggest that adrenal nerves also have a role in modulating the hypothalamo-pituitary-adrenal (HPA) axis.

Morphological evidence

Most undergraduate textbooks state that the adrenal cortex, in contrast to the medulla, has no nerve supply (see references cited by Robinson, Perry, Hardy et al. 1977; Migally, 1979). Recent work, however, has demonstrated that the cortex shares with the medulla both efferent post-ganglionic adrenergic and sensory (afferent) nerve endings, some of which run in the splanchnic nerves while others travel to the gland with blood vessels (Holzwarth, Cunningham & Kleitman, 1987; Kesse, Parker & Coupland, 1988; Mohamed, Parker & Coupland, 1988). This confirms a series of anatomical observations stretching back many years (Alpert, 1931; Willard, 1938) describing an

 

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