BRANCHES FROM THE CERVICAL PLEXUS. 



579 



It commences from the fourth cervical nerve, and receives usually a 

 fasciculus from the fifth. As it descends in the neck, the nerve is 

 inclined inwards over the anterior scalenus muscle ; and near the chest 



Fi<r. 3- 



Fig. 355. — "View of the Superficial Distribution op the Nerves proceeding from 

 THE Cervical Plexus (from Sappey after Hirsclifeld and Leveilld). i 



1, superficial cervical nerve ; 2, 2, descending branches of the same ; 3, ascending 

 branches ; 4, twigs uniting with the facial ; 5, great auricular nerve ; 6, its parotid 

 branch ; 7, its external auricular branch ; 8, twig of the same which pierces the auricle 

 to pass to its outer surface ; 9, branch to the deep surface of the pinna ; 10, its union 

 with the posterior auricular of the facial nerve ; 11, small occipital nerve ; 12, its branch 

 •which unites with the great occipital nerve ; 13, a mastoid branch or second small 

 occipital ; 14, twigs from this to the back of the neck ; 15, 16, supracla-idcular^nerves ; 

 17, 18, supra-acromial nerves ; 19, branch of the cervical nerves passing into^ the 

 trapezius muscle ; 20, spinal accessory distributed to the same and receiving a uniting 

 branch from the cervical nerves ; 21, branch to the levator scapulifi ; 22, trunk of the 

 facial nerve ; 23, its posterior auricular branch passing into the occipital and posterior 

 and superior auricular muscles ; 24, its cervico-facial branches. 



p p 2 



