STRUCTURE OF THE SPINAL CORD 



357 



CERVICAL. 



DORSAL. 



LUMBAR. 



FIG. 155. Sections of human spinal cord from the lower cervical, mid- 

 dorsal, and mid-lumbar regions, showing the principal groups of nerve- 

 cells, and on the right side of each section the conducting tracts as 

 they occur in the several regions (magnified about 7 diameters). 



(E. A. SCHAFER.) 



a, &, c, groups of cells of the anterior horn ; d, cells of the lateral horn ; 

 e, middle group of cells ; /, cells of Clarke's column ; g, cells of posterior 

 horn ; cc, central canal ; ac, anterior commissure. 



