CONCLUSIONS AS TO NATURE OF FUNCTIONAL ACTIVITY. 295 



subbranches and terminal filaments, originate from nerves derived 

 from the general cerebro-spinal motor system, a single stream of 

 efferent impulse-waves excites and regulates the functional activity 

 of the organs concerned ~by simultaneously stimulating all their 

 structural elements. 



8. As the vibratory rhythm of the stream of impulses trans- 

 mitted by a nerve always corresponds with that of the structures 

 to which its terminal filaments are distributed, any variation of 

 vibratory rhythm transmitted from the cerebro-spinal centers by 

 the general motor nerves gives rise to a corresponding variation of 

 activity in the structures or organs supplied by these terminal 

 filaments. 



9. In all the above-mentioned organs the oxidizing substance 

 a combination of adrenal secretion and oxygen formed in the 

 lungs and of which the blood-plasma is the vehicle is the physico- 

 chemical agency through which cellular metabolism is sustained 

 during PASSIVE functional activity, and increased during ACTIVE 

 functional activity. 





