628 ANIMAL PHYSIOLOGY. 
tions between the parts of the nervous system, and indeed all 
of the tissues, are essential for perfect “nutrition,” if we are to 
continue the use of that term at all. 
II. THe CRANIAL NERVES. 
These nerves have been divided into nerves of special sense, 
motor, and mixed nerves. 
The first class has already been considered with the senses 
to which they belong. ' 
The physiology of the cranial nerves has been worked out 
by means of sections and clinico-pathological investigations, 
Speaking generally, a good knowledge of the anatomy of these 
nerves is a great step toward the mastery of what is known 
of their functions, and such will be assumed in this chapter, so 
that the student may expect to find the treatment of the sub- 
ject somewhat condensed. 
Conarium 
Pulvinar Oss : } H Brachium conjunctivum anticun 
i ’ Brachium conjunctivum 
f feed posticum 
‘orpus geniculatum 
oe mediate 
ticum : 
bt ted C Pedunculus cerebri 
geminum (posticum 
Locus coeruleus 
ad corpora qua- Crus 
3 7 ~ drigemina 
Eminentia tere ad medullam ( cerebelli 
oblongatam 
Crus cerebelli. 
ad pontem 
Ala cinerea 
Accessorius nucleus 
Obex 
Clava 
Funiculus cuneatus 
Funtculus gracilis 
Fig. 470.—Intended to show especially the origin both deep and superficial of cranial nerves 
(after Landois). Roman characters are used to indicate the nerves as they emerge, and 
Arabic figures their nuclei or deep origin. 
The Motor-Oculi or Third Nerve—With a deep origin in the 
gray matter of the floor and roof of the aqueduct of Sylvius, 
