THE PERIPHERAL NERVE-ENDINGS. 



several nerve-fibres instead 

 of a single one may supply 

 the end-plate. 



The nerve-endings in 

 the voluntary muscle of 

 amphibians and bony fishes 

 differ from the foregoing in 

 the absence of the granular 

 protoplasmic disk, and in 

 the more diffuse disposi- 

 tion of the terminal nerve- 

 fibres. The axis-cylinders, 

 in these cases, branch into 

 fibrillae which extend for 

 some distance parallel to 

 the axis of the muscle- 

 fibre and end in slight 

 bulbous expansions ; gran- 

 ular pyriform nuclei also 

 occur along the course of 

 these fibrillas. 



The muscle-spindles 

 described by Kiihne, and 

 considered by some 

 (Kerschner) as special 

 sensory nerve endings, 

 appear to be transient 

 developmental structures 

 connected with the cleav- 

 age of the muscle-fibres 

 (Kolliker). 



Tendon. In addition 

 to the sensory end- 

 plates of tendon, studied 

 by Kolliker, Rollett, 

 Sachs, Golgi, and others, 

 which consist of an intri- 

 cate net-work of pale 

 non - medullated fibres, 

 Golgi has described pe- 

 culiar nerve-endings in 

 tendon to be found in the 

 immediate vicinity of the 

 union with the muscle. 



FIG. 112. 



3ow^# 



mm &j* ; 



j&l LfeSfi! 



^!$1 



M5"t-i 



^1^ 



' 4t W 'UV' 



Ev 



Golgi's corpuscle or tendon-spindle from the human tendo 

 Achillis ; gold preparation : ff, nerve-fibres surrounded by 

 the perineurial sheath (Fs) spreading out into the reticular 

 ramifications (Ev) of the axis-cylinder; A, the tendon- 

 bundles, one of which is separated at 6 ; Aff, the muscle- 

 fibres; R, node of Ranvier. (After Ciaccio.) 



