The parts of the nervous system 

 represented are the cerebrum, 

 cerebellum,bulb,and segment 

 of the spinal cord. Afferent 

 nerves in red, efferent nerves 

 in black, m, m, motor neu- 

 rones to some of the muscles 

 of the leg. These may be 

 stimulated to coordinate ac- 

 tion by neurones (v) from 

 the cerebrum, neurones (cb) 

 from the cerebellum, or by 

 the afferent neurones (a/ 1 ) 

 from the tendons, etc. In the 

 bulb this afferent neurone 

 connects with a second neu- 

 rone (a/ 2 ), and this with a 

 third (a/ 3 ), thus providing 

 the path to the cerebrum and exciting 

 in consciousness sensations of position 

 of the leg (muscular sense). The same 

 neurones connect with the cerebellum, 

 as do also neurones from the inner ear. 

 For further explanations see Chapter 

 XV, pp. 275-279. 



Dia^am jTfJtlie Nervous mechanism of walking 



