826 



PHYSIOLOGY OF THE DOMESTIC ANIMALS. 



alone be rendered probable when it is recognized that the cerebellum is 

 in direct connection not only with all the columns of the spinal cord, 



i, 



F ' 



FIG. 358. UPPER SURFACE VIEW OF THE CEREBRUM OF VARIOUS ANIMALS. 



(Landois. ) 



I, cerebrum of the dog; I, u, HI, iv, the four primary convolutions; s, snlcus cruciatus; F, Sylvian, 

 fossa; o, olfactory lobe; 1, motor area for the muscles of the neck ; 2, extensors and abductors of the fore 

 limb; 3, flexors and rotators of the fore limb; 4, the muscles of the hind limb: 5, the facial muscles; 

 6, lateral switching motion of the tail ; 7, retraction and abduction of the fore limb ; 8, elevation of the 

 shoulder and extension of the fore limb, as in walking; 9, 9, orbicularis palpebrarum. II, aa, retraction 

 and elevation of the angle of the mouth ; b, opening of the mouth and movements of the oral centre ; 

 cc, platysma ; d, opening of the eye ; p, optic nerve ; I, t, thermic centre. Ill, cerebrum of rabbit, from 

 above ; IV, cerebrum of the pigeon, from above : V, cerebrum of the frog, from above ; VI, cerebrum of 

 the carp, from above. In all these o is the olfactory lobe; 1, cerebrum; 2, optic lobe; 3, cerebellum; 

 4, medulla oblongata. 



especially with the posterior columns, whose division has been found to 

 lead to inco-ordination, but with the basal ganglia of the cerebrum, which 

 we have found to be especially concerned in this function. It is 



