990 



THE NERVOUS SYSTEM 



nose is supplied medially by the supratrochlear, the infratrochlear, and the nasal 

 branches of the first division, and laterally by the infra-orbital branch of the second 

 division. The upper eyelid is supplied by the supratrochlear, the supra-orbital, 

 and the lachrymal branches of the first division; the lewer eyelid by the infra- 

 trochlear branch of the first division and by the infra-orbital and the zygomatico- 

 facial (malar) branches of the second division. The skin over the upper jaw and the 



FIG. 708. DIAGRAM OF THE CUTANEOUS NERVE AREAS OF THE HEAD AND NECK. 



Red First division of trigeminus. \\hite Second division of trigeminus. 



Blue Third division of trigeminus. 



Dark shading Posterior primary divisions of cervical nerves. 

 Oblique shading Ascending and transverse superficial branches of cervical plexus. 

 Transverse shading Descending superficial branches of cervical plexus. 

 It must be remembered that the boundaries of each area are not distinct; wherever two 

 areas meet they overlap. 



SMALLEST 

 OCCIPITAL 



::: : : ORE A T, '. .'. : ': 

 ~"OCCIP7TAL : -~' ''' ' 



AURICULO- / 

 TEMPORAL 



Igl'.. y'lNFRA-( __N V 

 *3sT 

 f 



SUPERFICIAL 

 ^CERVICAL 



DESCENDING CER VIC A L 



TEMPORAL 



SUPRA - 

 T ROC II LEAR 



LACHRYMAL 



INFRA - 

 ROC H LEAR 



NASAL 



zygomatic (malar) bone is supplied by the infra-orbital and zygomatico-facial 

 branches of the second division, that over the buccinator by the buccal branch of the 

 third division, and that over the lower jaw, from before backwards" by the mental, 

 buccal, and auriculo-temporal branches of the third division, except a small part near 

 the posterior border which receives its supply from the great auricular nerve. 



