636 ANIMAL PHYSIOLOGY. 
RELATIONS OF THE CEREBRO-SPINAL AND SYMPATHETIC 
SYSTEMS. 
No division of the nervous system has been so unsatisfactory, 
because so out of relation with other parts, as the sympathetic. 
It was also desirable to attempt to co-ordinate the cerebral and 
spinal nerves in a better fashion ; and various attempts in that 
direction have been made. Very recently a plan, by which the 
whole of the nerves issuing from the brain and cord may be 
brought into a unity of conception, has been proposed; and, 
though it would be premature to pronounce definitely as yet 
upon the scheme, yet it does seem to be worth while to lay it 
before the student, as at all events better than the isolation 
implied in the three divisions of the nerves which has been 
taught hitherto. 
Fia. 474. 
We = Fic. 473. 
bi 
Fie. i apace ae cell from sympathetic ganglion of frog ; greatly magnified, and showing 
both straight and coiled fibers (after Quain). 5 
Fie. 474.—Multipolar ganglion cells from sympathetic system of man, highly magnified (after 
Max Schultze). a, cell freed from capsule; b, inclosed within a nucleated capsule. In 
both the processes have been broken away. 
Instead of the classification of nerves into efferent and 
afferent, connected with the anterior and the posterior horns 
