xvi CONTENTS. 



PAGE 



165. The effects on the vessels of the ear of dividing and stimulating 



the cervical sympathetic nerve ....... 326 



166. Course of vaso-motor fibres of the ear 327 



167. The effects on the vessels of the submaxillary gland of stimulating 

 the chorda tympani nerve ; vaso-constrictor and vaso-dilator 

 fibres 329 



168. Vaso-motor nerves of other parts of the body. Constrictor and 



dilator fibres in the sciatic and brachial nerves .... 331 



The Course of Vaso-motor Fibres. 



169. The course of vaso-constrictor fibres ...... 335 



170. The course of vaso-dilator fibres 337 



The Effects of Vaso-motor Actions. 



171. Local and general effects of the constriction and dilation of an 



artery or set of arteries ........ 338 



Vaso-motor Functions of the Central Nervous System. 



172. Vaso-dilator fibres usually employed as part of a reflex action . . 340 

 173. Loss of tone resulting from the division of the spinal cord at various 



levels. Vaso-motor centre in the spinal bulb .... 341 



174. The Depressor nerve 343 



175. Eise of blood pressure from stimulation of afferent nerves ; pressor 



effects 344 



176. The limits of the bulbar vaso-motor centre 345 



177. The relation of the bulbar vaso-motor centre to other spinal 



vaso-motor centres. Nature of dilation, tone, and constriction 



of blood vessels .......... 346 



178. Summary of vaso-motor actions ....... 350 



179. Instances of vaso-motor actions. Blushing. Effect of warmth on 



skin. Vascular changes in kidney and alimentary canal . . 352 

 180. Vaso-motor nerves of the veins 353 



SECTION VII. 

 THE CAPILLARY CIRCULATION. 



181. The normal capillary circulation. The axial core and the plasmatic 



layer 355 



182. Changes in the capillary circulation induced by irritants. The 



phenomena of inflammation 356 



183. The migration of white corpuscles. Stasis 358 



184. Nature of the inflammatory changes 359 



185. Changes in the peripheral resistance due to changes in the blood . 360 



