Nerve supply to the skin the kind of sensory inputs which project to a specific region of the primary somatosensory cortex. Groups of nerve terminals located in the different layers of the skin are categorized depending on whether the skin is hairy, nonhairy, or an exposed mucous membrane. The hairy parts of the body such as the forearm or the leg have two groups of nerve endings: those that end along with the hair follicles, and also with the arborizations of unmyelinated axons which are referred to as “free” nerve endings because they are served by both myelinated and unmyelinated axons. Nonhairy skin, such as
Expedition to the Demonweb Pits art was by David Hudnut, with interior art by David Bircham, Miguel Coimbra, Ed Cox, Carl Critchlow, Eric Deschamps, Wayne England, Erik Gist, Brian Hagan, Ralph Horsley, Howard Lyon, Ted Pendergraft, Arnie Swekel, and James Zhang. When asked whether this adventure was influenced by module "Q1: The Demonweb Pits", designed as a revision, or a completely new expedition, Wolfgang Baur explained: "Of course "Expedition" was influenced by "Q1", since there would be no Demonweb Pits without that classic module. But we took the plot in a new direction, focusing on Planescape elements such as the cities of Sigil and Zelatar,