DISSECTING MANUAL. 



with the great auricular and auriculo-temporal and spreads out 

 (pes anserinus) in two divisions. The temporo- facial division 

 splits into three sets of branches, viz.: temporal, crossing the 

 zygoma; malar, crossing the malar bone; and infra-orbital, 

 crossing the Masseter and joining the infra-orbital plexus. The 

 cervico-facial division splits into three sets of branches, viz.: 

 buccal, to the angle of the mouth; supra-mandibular, a single 

 branch running along the lower jaw; and infra-mandibular, a 

 single branch running below the lower jaw to the Platysma 

 and communicating with the superficial cervical. These 

 branches supply the muscles of the face. [687] 



The infra-orbital plexus is formed, below the lower eyelid, 

 by the union of the infra-orbital branches of both the facial 

 and superior maxillary. [688] 



Glosso-pharyngeal. Emerging from the jugular foramen 

 and developing two ganglia, this descends between the internal 

 jugular and internal carotid, and then between the carotids, to 

 the pharynx. Then crossing the Stylo-pharyngeus and stylo- 

 hyoid ligament, it runs under the Hyo-glossus to the tongue 

 and divides into lingual branches, which supply the mucosa on 

 the dorsal third and lateral half of the tongue, extending to 

 the glosso-epiglottidean folds and front of the epiglottis. While 

 crossing the Stylo-pharyngus it gives off a branch which sup- 

 plies that muscle and sends fibres through it to the pharyngeal 

 mucosa. The pharyngeal branches arise in the neck and supply 

 the pharyngeal mucosa directly after piercing the Superior 

 constrictor, and indirectly through the pharyngeal plexus. 

 A tonsillitic branch forms a plexus (circulus tonsillaris) which 

 supplies the mucous membrane on the tonsil and adjacent 

 parts of the soft palate and fauces. [689] 



The jugular ganglion, the smaller, lies in the jugular fora- 

 men above the petrous ganglion and involves only part of the 

 nerve. It has no branches and may be absent or fused with 

 the petrous ganglion. [689] 



The petrous ganglion lies in the lower part of the jugular fora- 



[74] 



