HuBER, Neiiro-tendinoiis End-organs. 157 



other skeletal muscles of the cat, and while there may be some 

 similarity between the two varieties of endings, this seems not 

 as close as the following statement of Sherrington (5) might 

 indicate : ' ' This terminal arborisation which the nerve-fibers 

 finally make is, as a rule, small as compared with the end-arbor- 

 isations of the ordinary Kiihne-Ruffini ' spindle ' or the Golgi 

 ' tendon organ ' but closely resembles in numerous instances the 

 form of arborisation of the latter." 



The end-organs here described have been found in all the 

 recti and obliqui eye-muscles of the cat, so far never in the re- 

 tractor of the bulb. In my preparations they have been rela- 

 tively more numerous in the superior rectus than in the other 

 eye muscles. This may, however, be due to the fact that the 

 nerve-fibers and endings seemed always best stained in the super- 

 ior rectus. In a number of my preparations I have been able 

 to count some 25 to 30 end-organs in one muscle. In such 

 preparations there is nearly a continuous band of end-organs 

 across the entire tendon, just distal to the fleshy portion of the 

 muscle, a band in which the end-organs are quite as numerous 

 as in the small portion of tendon reproduced in the figure. 



It is of interest to note that the nerve fibers ending in 

 these end-organs are not branches of the ophthalmic division of 

 the trigeminus, but that the III, IV and VI nerves, although 

 purely muscular, must be sensori-motor. This the excellent 

 and painstaking experiments of Sherrington (5-6) would seem 

 to show conclusively. 



LITERATURE. 



HuBER. A Note on Sensory Nerve-endings in the Extrinsic Eye-muscles 

 of the Rabbit. "Atypical Motor-endings" of Retzius. Anat. An- 

 zeiger, Vol. XV, 1899. 



Camillo Golgi. Sui nervi dei tendini, e di un nuovo organo nervoso ter- 

 minale muscolo-tendineo. Memoire della R. Academia delle Scieme di 

 Torino, Serie II, tomo XXXII. I have consulted— Ueber die Nerven 

 der Sehnen des Menschen und anderer Wirbelthiere und iiber ein 

 neues nervoses musculo-tendinoses Endorgan. Untersuchungen iiber 

 den feineren Bau des centralen und perlpherischen Nervensystems. 

 Camillo Golgi, Jena, 1894. 



