CUTANEOUS AREAS OF THE NECK 

 The Cutaneous Areas of the Auricle (Pinna) 



1019 



The upper two-thirds of the outer surface of the pinna are supphed by the auriculo-temporal 

 branch of the mandibular division of the trigeminus, and the lower third by twigs of the great 



Fig. 774. — Diagram of the Cutaneous Nerve Areas of the Head and Neck. 

 Red — ophthalmic division of trigeminus. White — maxillary division of trigeminus. 



Blue — mandibular division of trigeminus. 

 Dotted 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 Vf'-^- 



Zygomatico- 

 temporal 



Supra-trochlear 



Lacrimal 

 Infra-trochlear 



Nasal 



Small occipital 



auricular nerve. The lower three-fourths of the cranial surface of the pinna are supplied by 

 the great auricular nerve, and the upper fourth by the small occipital nerve. The posterior 

 surface of the external auditory meatus receives filaments from the auricular branch of the 

 vagus. 



The Cutaneous Areas of the Neck 



The skin over the anterior part of the neck is supplied by the superficial cervical branch 

 of the cervical plexus, which contains fibres from the second and third cervical nerves, and 

 in the lower part of its extent, by the anterior supra-clavicular nerves (suprasternal branches), 



