53 



of their own. These movements have also been noticed by MM. 

 Scrres and Geoffrois de St. Hilaire. 



5. New Ganglion in the Eye. — Mr. Wharton Jones* has described 

 a minute ganglion, about one-sixtieth of an inch in diameter, con- 

 nected by a short pedicle to the largest of the ciliary nerves, in the 

 eye of the dog. It is situated at a point nearer to the entrance of 

 the nerve into the eyeball than its origin from the lenticular gan- 

 glion. It is composed of a small collection of nerve corpuscles, from 

 which a few nervous fibrils proceed, and which, united into a fasci- 

 culus, fornfs the pedicle by which it is joined to the ciliary nerve; 

 proving that a ganglion may be composed simply of a mass of gan- 

 glionic corpuscles, and nerve fibrils proceeding from it. He names 

 it the "Ganglion Caecum Ciliare." 



6. Office of the Ganglia. — M. C. Itobinf has endeavoured to 

 prove that the ganglia of the spinal nerves, and of the great sympa- 

 thetic do not give origin to elementary nerve tubes, as many modern 

 anatomists admit, but that all nerve tubes arise, exclusively, from the 

 spinal chord and encephalon. Hence ganglia can only be regarded 

 as special little nervous centres, performing, with respect to certain 

 functions, the same office as does the cerebro-spinal axis for the other 

 functions. Wagner's observations, on the contrary, corroborate the 

 suggestion of Todd and Bowman, that nervous fibrillar take their rise 

 immediately from the ganglion corpuscles. Each elementary fibre 

 of the my encephalic nerves, which enters a ganglion, passes into a 

 corpuscle, in which may also be seen its nucleus and nucleolus.;}; 

 From each ganglion-globule there arises another nervous fibre, which 

 is prolonged into the peripheric branch. 



7. Nerves and Ganglia of the Heart. — Dr. Robert Lec§ has 

 given a minute description of these, to which the committee can only 

 refer, as the article does not admit of being condensed. And M. 

 Gros|| has, with much accuracy, displayed the manner in which 

 nerves pass into bone. Three nerves enter the nutricious foramen ; 

 two come with the artery, which he calls "dyaphysial;" the third, 

 which is occasionally double, in the femur approaches through the 

 vastus internus. These are branches of the crural; but, in man, 



* Med. Gaz., Nov. 13, 1846. f Academie des Sci.,21 Juin, 1847. 



J Comptes Rendus, 10 Mai, 1847. § Med. Times. 



|| Archives Generates de Med., Jan. 1847. 



