70 
MR. YOUATT’s VETERINARY LECTURES. 
THE NERVES OF THE NOSE. 
This cavity is as plentifully supplied with nervous ramifications 
as with bloodvessels. First, there is the nerve of peculiar sensa¬ 
tion— the olfactory nerve , of which I shall have presently more 
fully to speak; passing through the numerous apertures of the 
cribriform plate, and spreading its pulpy matter over the whole 
of the nasal cavity, and probably over the membrane of the si¬ 
nuses connected with this cavity ; but most evidently to be traced 
on the upper part of the septum, and on the mthmoid and supe¬ 
rior turbinated bones. On this nerve depends v the sense of smell. 
Of nerves of common sensation we have, first, the palpehro - 
nasal (the lateral nasal of Mr. Percivall), a branch of the oph¬ 
thalmic, parting from it at the base of the orbit, between the 
levator and the retractor muscles, and entering again the cra¬ 
nium ; pressing through the cribriform plate, and ramifying 
minutely, and with many beautiful anastomoses on the aethmoidal 
cells, the frontal sinuses, the turbinated bones, and the septum ; 
a branch of it creeping along the top of the inferior turbinated 
bone, and sending its ultimate branches to the false nostrils, but 
other branches from other portions of it ramifying also on the false 
nostrils, and the alee of the nose. 
There is also the true lateral nasal , a branch of the anterior 
maxillary passing through the spheno-palatine foramen, and di¬ 
viding; giving one branch for the external wall of the cavity, 
and another for the septum and the posterior part of the cavity 
generally. 
One branch runs along the bottom of the septum to its ante¬ 
rior extremity, and through the foramen incisivum to the roof of 
the mouth. It sends a twig to the naso-palatine ganglion, and 
anastomoses with the palatine, and so completes the circle of 
nervous influence between the palate and the nose,—that con¬ 
nexion between the senses of t#ste and of smell, of which we 
have a thousand proofs. 
The anterior maxillary nerves give many filaments to the aim 
of the nose. 
THE SENSE OF SMELLING. 
The sense of smell is mostly connected with our enjoyment; 
occasionally, however, it is a source, perhaps a useful one, of in¬ 
convenience and annoyance. In the quadruped it is connected 
with life itself; it is that by which the animal is guided in the 
choice of wholesome food, and by which also he is chiefly led to 
the perpetuation of his species. 
