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Innervation of Corpus Suprarenale in Human Adult

1952; Tohoku University; Volume: 55; Issue: 2-3 Linguagem: Inglês

10.1620/tjem.55.259

1349-3329

Akira Sato,

Diet and metabolism studies

The cortex of the suprarenal gland largely receives nerve supply neither from the plexus capsularis nor plexus medullaris, while the vegeta-tive elements running along the blood vessels which finally pass into the terminalreticulum by Stöhr is recognized. The gland cells, however, are not always supplied by this reticulum, but mostly rather free from its supply. Then, the mechanism of the cortical secretion will be probably based upon that the gland cells are pressed by the extension of the blood capillaries, and accordingly the intracellular granules infiltrate in the capillaries. The medulla is favoured with nerve elements remarkably unlike the cortex. They take their rise in the nerve bundles coming from the plexus capsularis and passing through the cortex into the medulla, as well as in the sympathetic nerve cells existing in the medulla. After forming a com-plicated, but irregular plexus, the nerve fibres separate each other. They are more or less thick and characteristic by showing the special winding and variety of thickness. Besides, they do never terminate freely, but anastomose with each other, to form a great network. This is, of course, of vegetative nature, but morphologically differs from the common ter-minalreticulum remarkably. The medullar cells are supplied by this network with a contact mode. The mechanism of the medullar secretion will be chiefly based upon those many secretory nerve fibres forming the network, although the ex-tension of the blood capillaries is not impossible to be supposed, too, as in the cortex. The nerve cells in the medulla are of sympathetic nature, because they are divided into the cells of type 1 and type 2 of Dogiel. Stöhr's club- and ring-formed bodies existing in relation to the nerve cells are seemed not to be such sensory, as Stöhr supposed, but special terminations of the short processes from the nerve cells. They will probably consist in making stronger the proper significance of the short processes as the recepting end-apparatus. It is thought, that sensory nerve fibres will advance into the medulla, though very few, because sensory glomerular terminations rarely can be seen.