698 



TOUCH. 



[CH. LI. 



cells are granular and transparent, with a nucleus. The nerve 

 enters on one side and, laying aside its medullary sheath, terminates 

 between the cells in flattened expansions. 



A B 



Fig. 518. Papillae from the skin of the hand, freed from the cuticle and exhibiting tactile 

 corpuscles. A. Simple papilla with four nerve-fibres ; a, tactile corpuscle ; *, nerves 

 with winding fibres c and . B. Papilla treated with acetic acid ; a, cortical layei 

 with cells and fine elastic filaments ; 6, tactile corpuscte with transverse nuclei ; 

 c,, entering nerve ; d and e, nerve-fibres winding round the corpuscle. X 350. 

 (Kolliker.) 



Sensory nerve-endings in muscle. Nerve terminations, 

 sensory in function, are found in tendon. These appear very 

 much like end-plates, and are represented in figs. 521 and 522. 



Fig. 519. A corpuscle of 

 Grandly, from the 

 tongue of a duck. 



Fig. 520. A touch-corpuscle from the skin of the 

 human hand, stained with gold chloride. 



The neuro-muscular spindles, which are described on p. 93, and 

 which are principally found in muscles in the neighbourhood 

 of tendons and aponeuroses, are believed by the majority of 

 observers to be sensory end-organs. One of these spindles is 

 shown in the accompanying drawing (fig. 523). 



