722 



CUTANEOUS SENSATIONS 



[CH. LIT. 



are contained within a delicate nucleated sheath. The nerve enters 

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

 between the cells in flattened expansions. 



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. 524 and 525. The 



FIG. 522. A corpuscle of 

 Grandry, from the 

 tongue , of a duck. 



FIG. 523. A touch-corpuscle from the skin of the 

 human hand, stained with gold chloride. 



neuro-muscular spindles, which are described on p. 86, are principally 

 found in muscles in the neighbourhood of tendons and aponeuroses. 



FIG. 524. Termination of medullated 

 nerve-fibres in tendon near the mus- 

 cular insertion. (Golgi.) 



FIG. 525. One of the reticulated end-plates 

 of fig. 524, more highly magnified, o, 

 Medullated nerve-tibre; b, reticulated 

 end-plate. (Golgi.) 



One of these spindles is shown in the accompanying drawing (fig. 

 526). 



The principal grounds for believing the neuro-muscular spindles 

 to be sensory are, first, that the nerve-fibres that supply them do 

 not degenerate when the anterior roots of the spinal nerves are cut, 

 and secondly, that they do degenerate when the posterior roots are 

 divided (Sherrington). They also undergo degenerative changes i n 



