864 



ENDINGS OF NERVES OF GENERAL SENSATIONS. 



the skin of the glans penis and glans clitoridis. Each consists of a thin connective 



tissue capsule enclosing a core of homogeneous or nucleated semifluid substance. 



As the nerve-fibre pierces the capsule, it loses its 

 medullary sheath, and the axis cylinder is con- 

 tinued into the core of the bulb where it may 

 pursue a somewhat tortuous course, but more fre- 

 quently divides into minute varicose fibrils which 

 form an intricate plexus. The end bulbs of the 

 glans penis and glans clitoridis are named genital 

 corpuscles and differ from those just described in 



FIG. 741. GBANDRY'S CORPUSCLES FROM that they are larger and possess thicker capsules. 

 (Zn^in's ^r^.j 1 ^^ ^ Similar endings, termed articular lulbs, are found 



A, composed of three cells with two inter- m the synovial membranes of certain joints, e.g. 



posed discs, into which the axis those of the fingers. 



cylinder of the nerve-cell is observed (2) Corpuscles of Grandly (Fig. 741). These 



are *" in * he skin OOTe g thebeaks of aquatic 

 animals, and in the mucous membrane of the duck s 

 palate. Each consists of two or more flattened 



epithelial cells enclosed within a capsule, and the axis cylinder ends in flattened 

 " tactile discs " which lie between the cells. 



(3) Corpuscles of Pacini (Fig. 742). These are widely distributed and consist of 

 small oval bodies which measure from 2 to 3 mm. in length and about 1 mm. in 

 width. They are found on the cutaneous nerves of the hand and foot, on the infn 

 orbital and intercostal nerves, on the cutaneous nerves of the neck, nipple, am 

 mamma, and on the nerves of the solar plexus. They are present in the pariei 

 peritoneum and on the nerves of the joints, and are very plentiful in the mesentery 



tactile cells. 



FIG. 742. 



A, End bulb (Krause). 



B, Corpuscle of Pacini x 12 \, . . 



C, Corpuscle of Wagner and Meissner/^ atte 



FIG. 743. HERBST CORPI 

 OF DUCK (Sobotta). 



medullated nerve-fibre ; a, its a 

 cylinder ending in an enls 

 ment ; c, nuclei of cells of cc 

 t, nuclei of cells of outer tuni 

 t', inner tunics. 



of the cat. The capsule of the corpuscle consists of a number of connective tissu 

 tunics arranged concentrically around a central core of more or less clear proto 

 plasm ; the deeper tunics are closely applied to each other, but those towards th 

 circumference of the corpuscle are here and there separated by" narrow lymphati 

 spaces. Each corpuscle is attached to a nerve trunk by a narrow pedicle compose' 

 of a single medullated nerve-fibre which pierces the capsule and, on reaching th 

 core, loses its medullary sheath. The axis cylinder is continued into the core a 



