Note the multiple numbers of Merkel discs connecting to a single large myelinated fiber (A) and abutting tightly the undersurface of the epithelium. AA, nonmyelinated axon; C, capillary; CF, course bundles of collagen fibers; E, thickened epidermis of the touch corpuscle; FF, fine bundles of collagen fibers. (From Iggo A, Muir AR: The structure and function of a slowly adapting to