302 



ANATOMY IN A NUTSHELL. 



whore it leaves this nerve and passes across the muscle towards the angle of 

 the mandible. While crossing the muscle it lies in the deep fascia almost 

 parallel with but behind the external jugular vein. It divides into (a) the 

 mastoid branch which is distributed to the skin on the mastoid process, (b) the 

 auricular branches which are distributed to the integument on the pin a 

 at Its upper part, some of these branches are distributed to the integu- 

 ment on the outer surface of the lobule and the outer surface of the lower part 

 of the helix and antihelix, (c) the facial branches pass to the superficial lobules 

 of the parotid gland and the integument over and in front of the gland. In the 

 substance of the gland they unite with the cervico-facial division of the facial 



PLATE (XXXIV. 



CRICO-THYROID MEMBRANE 



INFERIOR CORNU OF 

 THYROID CARTILAGE. 



MEDIAN PORTION OF THYRO-HYG MEMBRANE y\ 



SUPERIOR CORNU OF 

 THYROID CARTILAGE 



FORAMEN FOR SUPERIOR LARYNGEAL NERVE 



1 _ MEDIAN NOTCH OF 



THYROID CARTILAGE 





II void Bone, Thyroid and Cricoid Cartilages. (Anterior View.) 



nerve. (3) It gives v. branch to help from the superficial cervical nerve which 

 com< - from the second and third cervical nerves. It appears a little below the 

 great auricular at the posterior border of the Sterno-cleido-mastoid and crosses 

 tld- muscle lying under the external jugular vein, although it may perforate it 

 or pass in front. This nerve divides into ascending and descending branches. 

 Tin' ascending branches supply the integument on the upper half of the neck 

 as high as the chin. It sends a branch which accompanies the external jugular 

 vein and another which unites with the facial. The descending branches sup- 

 ply the integument <>n the lower half of the neck as far as the sternum. (4) 

 One of the communicans hypoglossi, and a filament to the Sterno- 

 CLEIDO-mastoid. This filament communicates with the spinal accessory in 

 the substance of the muscle. 



