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By William Montagna

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Additional info for Cutaneous Innervation. Proceedings of the Brown University Symposium on the Biology of Skin, 1959

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WINKELMANN FIG. 11—Two mucocutaneous end-organs in the human clitoris. Both endorgans have a common nerve trunk. Winkelmann's silver method. x400. FIG. 12—Meissner corpuscle in human fingertip demonstrating the lobular configuration, the expanded terminal ending and a double-myelinated innervation. Winkelmann's silver method. x265. FIG. 13—Vater-Pacini corpuscle in the prepuce of a newborn, showing the typical coiled, non-expanded form. Winkelmann's silver method. xl70. FIG. 14—Coiled mammalian end-organ in the perianal region of the cat.

Winkelmann's silver method. x250. FIG. 5—Tntraepithelial nerve ending in the nose of the mole Winkelmann's S I M I L A R I T I E S IN C U T A N E O U S NERVE E N D - O R G A N S 51 The dermal nerve network is present in all vertebrates that are organized enough to have a sensory peripheral nerve apparatus. It is found in some invertebrates, such as worms, and in fishes, amphibians, reptiles, birds and mammals. During the development of the vertebrate embryo, the nerve net is the first ordered structure to appear in the dermis (Fig.

F r o m : R. K. Winkelmann's The Neu roana to my of Human Skin, 1956 (Thesis, University of Minnesota). The mucocutaneous end-organ of non-primate mammals is a different structure (Fig. 14). It is an encapsulated bulb-type of ending, with a central axial nerve coiled many times upon itself (Winkelmann, 1957b). It is surrounded by concentric lamellae and is like a rudimentary Yater-Pacini corpuscle or at least like the inner bulb of the fully developed Vater-Pacini corpuscle (Figs. 13, 14). It resembles the mucocutaneous end-organ in man only in that it contains nonspecific cholinesterase.

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