[Ultrastructural relationships between terminal vegetative nerve fibers, ground substance and differentiations of cell surface (author's transl)].

Ultrastructural findings concerning the terminal vegetative nerve formation indicate a functional coupling via proteoglycans of the extracellular matrix with effector cells. The biological function of proteoglycans in the ground substance and in surface coats of axons and cells are discussed in connection with fusiform varicose swellings along terminal vegetative nerve fibers. These contain accumulated vesicles which probably are active in releasing transmitter substances.