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TEXT-BOOK OF PHYSIOLOGY 



them in consequence of cerebral (psychic) or physiologic activities in different 

 parts of the body is a matter of personal experience; that the heart is abnor- 

 mally influenced by the same nerve-centers in response to nerve impulses 

 transmitted to them in consequence of pathologic and traumatic processes 

 occurring in different regions of the body,, and that both heart and nerves 



Emotional Centers 



Hchilarating (BLUC) 

 Depressing (*(>} 



Ca/tfio -Inhibitor Center. 



Ganglion Stellatum 



Cantio -Accelerator Center 



Affer,t,t\ x citutor (BLUE.) 

 Atterent (inhibitor (BLUE) 

 ffinnt {inhibitor]* >ED) 



Sympathetic M roes' 



Accelerator &Augmentor 



Intra-CardiacNerue Cells 



FIG. 140. DIAGRAM OF THE NERVE MECHANISM OF THE HEART. (jG. Bachman.) 



are modified in different ways by the action of drugs introduced into the 

 body, are matters of daily clinical experience. 



The nerves comprising this mechanism and the relation they bear one to 

 another are represented in Fig. 140. 



It was stated in a previous paragraph, page 297, that the contraction of 

 the heart-muscle is independent of its connection with the central organs of 



