THE INTER-EPITHELIAL ARBORIZATIONS 



73 



to the surface of the skin or mucous membrane lose their neurilemma and 

 myelin sheath, the bare axis-cylinder divides and subdivides into minute 

 ramifications among the epithelial cells of the skin and mucous membrane. 

 In the various glands of the body this form of termination also prevails. 



FIG. 98. Sensory-Nerve Terminations in Stratified Pavement Epithelium. Golgi's rapid 

 method. (After G. Retzius.) 



The hair-bulbs, the teeth, and the tendons of the body are supplied by this 

 same process of terminal arborization, figures 98, 99. 



The motor nerves to the muscles end in what are known as muscle-plates, 

 the details of whose structure have been already described. 



The special sensory end-organs will be described later in the chapter 

 on the Special Senses. 



A fourth form of termination consists of corpuscles that are more or less 

 encapsulated, and these are known as the corpuscles of Pacini, the tactile 



FIG. 99. Sensory-Nerve Termination in the Epithelium of the Mucosa of the Inferior Vocal 

 Cord and in the Ciliated Epithelium of the Subglottic Region of the Larynx of a Cat Four Weeks Old. 

 (After G. Retzius.) Golgi's rapid method, n, Nerve-fibers rising from the connective-tissue layer 

 into the epithelial layer, where they terminate in ramified and free arborizations. 



corpuscles oj Meissner, the tactile corpuscles of Krause, the tactile menisques, 

 and the corpuscles of Golgi. 



The Pacinian Corpuscles. These nerve endings, named after 

 their discoverer Pacini, are elongated oval bodies situated on some of the 

 cerebro-spinal and sympathetic nerves. They occur on the cutaneous 

 nerves of the hands and feet, the branches of the large sympathetic plexus 

 about the abdominal aorta, the nerves of the mesentery, and have been 

 observed also in the pancreas, lymphatic glands, and thyroid glands, figure 100. 

 Each corpuscle is attached by a narrow pedicle to the nerve on which it is 

 situated, and is formed of several concentric layers of fine membrane, each. 



