54 MUSCLES. 



by loops, in the muscles of the smaller mammiferse, 

 and in man. Lebert* also has given a representation 

 of nerves terminating by loops, in the muscles of the 

 abdomen, and in the tongue of the frog. 



Remak has discovered microscopical nervous gan- 

 glia in the auriculo-ventricular septa of the frog's heart, 

 and very rightly ascribes to their influence the persist- 

 ence of the rhythmical pulsations of the organ, when 

 isolated from the body, as well as the continued regu- 

 lar contractions in the septum itself, when this has 

 been detached from the rest of the heart. 



From the observations of Reichert, who has care- 

 fully studied the distribution of the nerves of the 

 frog's heart, it would appear that each muscular fibre 

 is in relation with several nervous filaments. Volk- 

 man has sought to establish the numerical proportion 

 of large and slender fibres which enter the substance 

 of a striped muscle ; he has counted twelve slender 

 fibres in an hundred. 



Very little is known of the mode of distribution of 

 its nerves to the non-striated muscular tissue. It may 

 be asserted, probably, with truth, that it is much less 

 richly supplied with nerves than the striated variety ; 

 the middle coat of the arteries affords evidence of 

 this. 



* H. Lebert, at present Professor of Clinical Medicine in the University 



of Breslau, author of Physiologic pathologique, 2 vols. Paris, 1845 ; thje 



" Traite & Anatomic pathologique" now in course of publication, and 



numerous papers in the Annales des Sciences Naturelles, and elsewhere. 



t Bogislav Keichert, Professor of Anatomy at Berlin, successor to 

 Muller. (Ed.) 

 k t Professor of Anatomy at Dorpat, Livonia. (Ed.) 



