914 



THE NERVOUS SYSTEM 



mastoid, auricular, and facial. As the nerve ascends obliquely across the sterno- 

 inast.oid it is embedded in the deep cervical fascia, is covered by superficial fascia 

 and the platysma, and it lies parallel with and slightly behind the external jugular 

 vein, (a) The mastoid branch is small, and is distributed to the integument cover- 

 ing the mastoid process. It anastomoses with the posterior auricular and small 

 occipital nerves, (ft) The auricular branches are three or four stout twigs which 

 anastomose with the branches of the posterior auricular nerve;, they cross the super- 

 ficial surface of the posterior auricular branch of the facial, and are distributed to 

 the skin on the back of the pinna with the exception of its uppermost part. One or 

 two twigs pass through fissures in the cartilage of the pinna, and are distributed to 



FIG. 677. SUPERFICIAL BRANCHES OF THE CERVICAL PLEXUS 

 After Hirschfeld and Leveillc'.) 



POSTERIOR 

 AURICULAR 

 NER VE 



FACIAL XKRVK 



lURICVLUt BB. OF 



riRKAT Afltlt'Ci. \l: 

 CERVICAL BRANCH 

 OF FACIAL 



CERVICAL CUTANEOUS 

 BRAXCHKS I IF I'KRVl- 

 CAL CUTANEOUS 

 NERVE 



ANTERIOR SUPRA- 

 CLA VICULAR 



}BRAXf'HKK III- 

 <;I:I-:A r 

 AVKICI'LAR 



GREAT AURllTI.Alt 



MASTOfll BR. OR 2nd 



UMAI. I, IXTIl'lTAL 



SPIt \l. ACCESSORY 



.-.y fROX THK 



MA3TO1D llltAM II 



BR. TO LEVATOR 



sc.\ ///..;; 



POSTERIOR Kl'PRA- 

 CLA VICL'LAR 



SIllilil.K .1CPRA- 



Cl.A VICrl.Alt 



BRA SCIIES TO 

 TRAPEZIVS 



Minni.E SUPRA- 



CLAVICULAR 



the integument on the outer surface of the lobule and the outer surface of the lower 

 part of the helix and anthelix. (c) The facial branches pass upwards and forwards 

 among the superficial lobules of the parotid gland, and supply the skin over that 

 gland and immediately in front of it, and they anastomose in the substance of the 

 gland with the cervico-facial division of the facial nerve. In some cases fine twigs 

 may be traced forwards nearly to the angle of the mouth. 



Transverse branch. The Superficial Cervical Cutaneous Nerve (transverse 

 cervical) arises, from the second and third cervical nerves (figs. 675, 676), and 

 appears at the posterior border of the sterno-mastoid, a little below the great auric- 

 ular nerve. It passes transversely across the sterno-mastoid under cover of the integ- 

 ument, platysma, and external jugular vein, and divides into a number of twigs which 



