THE CKKVIL'AL l'LK\ TX 



the second ami third cervical ii'Tves or from the loop between them and runs up- 

 wards and backwards to the posterior border of the sterno-mastoid. where it hooks 

 around the lower border of the .-filial accessory nerve and then ax-ends along the 

 posterior border of the muscle to the ma.-toid procos. It pierces the deep cervical 

 fascia ami pa>.-cs across the po.-terior part of the insertion of the sterno-mastoid into 

 the superficial fascia of the scalp, in which it breaks up into auricular, mastoid, and 

 occipital terminal branches. (<i) The auricular branch runs upwards and slightly 

 forwards to reach the integument on the upper median part of the pinna, to which 

 it is distributed, (b) The mastoid branch is distributed to the skin covering the 

 base of the mastoid process, (c) The occipital branches ramify over the occipitalis 



FIG. C7G. DIAGRAM OF THE CERVICAL PLEXUS. 



OASQLIOH 



III-' ritr.V/i OF 



' 



S V. I /. /. 

 OCC1P1 1'AI, 



GREA T 

 AVRICL'I.AR 



. 

 HBDIVS 



SPIRAL 

 ACCESSORY 



CERlTr.tr. 

 CUTANEOUS 



BCALENUa 



MK OIL'S 



LEV \ nni 



v I IT1..T, 

 SYMPATHETIC 



LONGUSCAPITIS 



RECTUS CAPITIS ANTERIOR 



RECTl'S CAl'lTIS I.ATKRALIS 



UYPOGLOSSAL 

 ISUPl i:i<n: rrrnrtr. 



HY.MJ'A 11IET1C (JAXGLION 



cou.r 



LOHGl'S CAl'lTIS 



GENIO-1IYOID 

 THYREO-HYOID 



LONG US COLLI 



LOSGVSCAPIT1S 



JHWEKDKKS 



IIYPOGLOSSJ 

 OMO-HYOID 



/.OXOVS COLLI 

 STERXO-HYOID 



LONGUS CAPITIS 

 SCALEXCS 

 A XTKKIOR 



AXSJL UTPOOLOSSI 



&TERKO- 



THYREOID 

 OMO-1IYOID 



SCAI.EKCS MEDICS 

 LEVA TOR SCAPULA: 



.t \TKnrnR SCPRACLATICULAR 



-- 



mvisclc and are distributed to the skin of the scalp; they communicate with one an- 

 oi her and with the great occipital nerve. The branches of the small occipital nerve 

 anastomose with twigs of the posterior auricular, great auricular, and great occipital 



nerves ! !ig. (177). 



(2) The Great Auricular Nerve arises from the second and third cervical nerves 

 digs. 675, 67(i). It accompanies ihe small occipital to the posterior border of the 

 sterno-mastoid. but at that point it diverges from the small occipital (fig. 077) and 

 runs upwards and forwards across the sterno-mastoid towards the angle of the 

 mandible. When it is about half-way across the muscle it begins to break up into 

 its terminal branches, which are named, according to the area of their distribution, 

 58 



