



•I HI ■ 



pine; that is, the} Btim 

 slow ing and possibl) an i 



In the mammalian I 



-ns ii«t • pi oc< -••! 'In eel 

 be shown histological 

 < >n the other hand, the 

 I »i • to tin- auriculo> i 



turea are abundanl i - * 



results w hich follow Btimulatioi 

 influence which the nen • 

 the majority of i' I 



vagus i^ likely to produce slov 

 stimulation of tin- lefl vagus is more I 

 partial heart-block. 



< »ii account of tin- differ* 

 lating the vagus, some air horiti< 

 contain four kinds of ; 

 each kind <>t' influence \\ hich tl 

 ences are, it will In- remembered, on I 

 propagation of the heartbeat, an. I 

 !• is, however, almosl certainly unn< 

 tinn, for the results can be 

 ferenl dec "' stimulation 



exacl part of the ln-art to which tl 



ample, when the right vagus m 

 I nly a diminution in thi 



• 



their rate, indicating thai I 

 the auricular «i alls and i 

 is increased a little, then both i 

 indicating thai the Btimulus 

 culature directlj and I 



Tin- Sympathetic Control 



Tin mpat I 1 as 



being exactly opp< 

 the tih'-rs of thi 



y arise in the mamm 

 upper thoracic portion of tl 



ponding spinal i 

 the sympathi ain, up 



rvical ganglis \ 

 til-. 



