and Junctions of the nerves. 423 
By thus distinguishing the nerves of respiration, and as it 
were separating them from the others, we reduce the re- 
maining part of the nervous system to comparative simplicity. 
The seeming intricacy in the branching of the nerves, their 
convergence to certain organs from different origins, their 
re-union and divergence, instead of being a source of confu- 
sion, becomes a subject of the highest interest. The re-union 
and crossing of nerves we now ascertain to be for the purpose 
of associating the muscles into different classes, for combining 
them in subserviency to different organs, and placing them 
under the guidance of a sensibility more certain in its opera- 
tion than the will. 
By these observations, simplicity and arrangement are now 
the characters of our anatomical demonstrations, and a better 
foundation is afforded for discovering and comprehending the 
symptoms of disease. 
EXPLANATION OF PLATE XXX. 
This engraving represents the nerves of the face, in illus- 
tration of the paper on that subject. 
A is the respiratory nerve of the face, or the portio dura of 
the seventh, according to the system of Willis. 
a. Are branches of this nerve ascending to the temple, 
where also branches of the fifth nerve may be seen coming 
out above the jugum. 
h. Branches of this nerve ascending to the muscles of the 
forehead and eyebrow. 
c. A large division of the respiratory nerve which goes to 
the muscles of the mouth and to the integuments of the cheek, 
where they accompany the blood-vessels that suffuse the 
cheek. 
