802 



PHYSIOLOGY OF THE DOMESTIC ANIMALS, 



FIG. 343. DIAGRAM OF A SPINAL SEGMENT AS A SPINAL CENTRE AND CON- 

 DUCTING MEDIUM, AFTER BRAMWELL. (Landois.) 



B, right, Bl, left cerebral hemispheres: M O, medulla oblongata: 1, motor tract from right hemi- 

 sphere, largely decussating at M O. and passing down the lateral column of the cord on the opposite side 

 to the muscles M and Ml ; 2, motor tract from left hemisphere : S. Si, sensitive areas 011 the left side of 

 the hody ; 3, 31, the main sensory tract from the left side of the body : it decussates shortly after enter- 

 ing the cord : 82. S 3 , sensitive arena, and 41, 4, tracts from the right side of the body. The arrows 

 indicate the direction of the impulses. 



