86 



THE NERVOUS SYSTEM. 



popliteal nerves, the former of which passes along the 

 back of the thigh to the knee, where it becomes the 



FIG. 30. Diagrammatic view of the sympathetic cord of the right side, show- 

 ing its connections with the principal cerebro-spinal nerves and the main preaortic 

 plexuses. (Reduced from Quain's anatomy.) 



posterior tibial, which in turn divides at the ankle into 

 the internal and external plantar. The external popli- 



