r 17 9 ] 
that in Ganglions the different nervous filaments are 
very intimately mixed, a new nervous organization, 
or modification of the medullary fubftance, may take 
place, fo as to fecern new animal fpirits, or alter the 
direction of thofe already brought thither; a con- 
jecture, which has the fanction of the lateft as well 
as the earlier thoughts of the great Morgagni (d). 
In order to determine the particular ufe of Gang- 
lions (the intimate ftru&ure of which, equally with 
that of the brain and medullary fubftance of the 
nerves, we are hitherto ignorant of ) in the animal 
fyftem ; let us try, if fomething tending this way 
may not be fuggefted, by relieving on the fun&ions 
and motions of the parts applied principally by nerv- 
ous cords from below the Ganglions. 
The intercoftal or great fympathetic nerves abound 
moft of all others with Ganglions (e ) ; and by ex- 
amining what is peculiar in the motions of parts, to 
which thefe nerves are diftributed, we fhall probably 
be led to the ufes of Ganglions. 
The mufcular fubftance of the heart has its prin- 
cipal, or rather all its nerves, from the intercoftals ; 
complicatione praefatorum nervorum, ac fanguiferorum, quam 
ex novis organicis partibus, quas provida folersque natura, fub- 
fiftentibus probeq excoctis liquidis, fimul etiam elongatis, vari- 
eque diTpofitis, folidorum fibris, fingat et creat. Lancifi, de 
Gangliis, loc. cit. 
(rt) bee Morgagni,, adverfar. Anatom, ii. p. 71. And De 
Sedibus et Caufis morborum, Epift. xii. art. 14. p. 95, vol. I. 
(e) Super omnes nerv .s, intercoftali, Ganglia funt frequen- 
tiffima, in cos vice quidem iria ; in thorace, lurnbis, et pelvi 
tot, quot nervorum ex (pinali medulla propagines intercoftalis 
accipic : turn in cordis vicinii, tub diaphragmate, circa arteriae 
coeliacm et mefentericae originem : et circa reriem pallim in plex- 
uofis retibus. Haller, Elem, Phyf. X. iv. p. 202. 
which 
