THE PYRAMTDAL TRACT 



527 



Fig. 8 From the seventh cervical segment of the spinal cord of the monkey 

 (Macacus rhesus). Pyridine silver. X 40. The pyramidal tract is a rounded, 

 somewhat darkly stained area near the columna posterior in the lateral funiculus. 

 It is sharply limited posteriorly but its ventral and lateral boundaries are less 

 distinct. The variations in the intensity of the staining of the different fasciculi 

 are the same as in the cat's cord and are dependent upon the same fundamental 

 differences in their component fibers. 



