84 SuRcrcAL APPLIED ANATOMY. [Chap. vi. 



liberally supplied with nerves by the inferior cervical 

 ganglion. The ganglion communicates with the vagus. 

 Troubles reflected along the vagus from the stomach 

 may reach the ganglion, and through it cause con- 

 gestion of the labyrinth, acting by way of the vertebral 

 artery. 



CHAPTER VI. 



THE NOSE AND NASAL CAVITIES. 



1. THE nose. The skin over the root, and the 

 greater part of the dorsum, of the nooa, is thin and lax. 

 Over the alse, however, it is thick, very adherent to 

 the deeper parts, and plentifully supplied with 

 sebaceous and sweat glands. Inflammation of the 

 integuments over the cartilaginous portion of the 

 nose is apt to be very painful, and to be associated 

 with much vascular engorgement. The pain depends 

 upon the tenseness of the part, which prevents it from 

 swelling without producing much pressure upon the 

 nerves, while the engorgement depends upon the free 

 blood supply of the region, and the fact that the edge 

 of the nostril being a free border, the circulation there 

 is terminal, and apt therefore to favour congestion. 



The great number of sebaceous glands about the 

 lower part of the nose renders it a favourite spot for 

 acne. It is here that the form of acne termed acne 

 hypertrophica is met with ; a condition that produces 

 the appearance known as "grog blossoms." The nose, 

 too, is frequently attacked by lupus, and it is indeed 

 over the dorsum of the nose that lupus erythematosus 

 is most commonly met with. llodent ulcer also is apt 

 to appear in this region, especially in the fold between 

 the ala of the nose and the cheek. 



