890 



NEUROLOGY 



The zygomaticotemporal branch (ramus zygomaticotemporalis; temporal branch) 

 runs along the lateral wall of the orbit in a groove in the zygomatic bone, receives 

 a branch of communication from the lacrimal, and, passing through a foramen 

 in the zygomatic bone, enters the temporal fossa. It ascends between the bone, 

 and substance of the Temporalis muscle, pierces the temporal fascia about 2.5 cm. 

 above the zygomatic arch, and is distributed to the skin of the side of the fore- 

 head, and communicates with the facial nerve and with the auriculotemporal 

 branch of the mandibular nerve. As it pierces the temporal fascia, it gives off a 

 slender twig, which runs between the two layers of the fascia to the lateral angle 

 of the orbit. 



Sensory root 

 Motor root 



Auriculotemporal 

 nerve 



Fia. 778. Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion. 



The zygomaticqfacial branch (ramus zygomaticofacialis; malar branch) passes 

 along the infero-lateral angle of the orbit, emerges upon the face through a foramen 

 in the zygomatic bone, and, perforating the Orbicularis oculi, supplies the skin on 

 the prominence of the cheek. It joins with the facial nerve and with the inferior 

 palpebral branches of the maxillary. 



The Sphenopalatine Branches (nn. sphenopalatini) , two in number, descend to the 

 sphenopalatine ganglion. 



The Posterior Superior Alveolar Branches (rami alveolares superiores posteriores; 

 posterior superior dental branches) arise from the trunk of the nerve just before 

 it enters the infraorbital groove; they are generally two in number, but sometimes 

 arise by a single trunk. They descend on the tuberosity of the maxilla and give off 

 several twigs to the gums and neighboring parts of the mucous membrane of the 

 cheek. They then enter the posterior alveolar canals on the infratemporal surface 



