394 HEALTH AND DISEASE 



portion of the temporal muscle, the molar glands, the buccinator muscle, 

 and to the lips. 



3. Nerve of Internal Pterygoid Muscle, to the internal pterygoid 

 muscle. 



4. Superficial Temporal or Subzygomatic Nerve furnishes small fila- 

 ments to the guttural pouch and the parotid gland. It sends a branch 

 to join the seventh nerve as it passes on to the face. 



5. The Gustatory Nerve, the larger of the branches of the inferior 

 maxillary trunk, is distributed to the mucous membrane of the tongue, 

 and the sublingual and submaxillary glands. This is the nerve of taste. 

 It is joined near its origin by the chorda tympani, a branch of the 

 facial nerve. 



6. The Mylo-Hyoidean Nerve to the mylo-hyoideus, and the lower 

 belly of the digastricus. 



7. The inferior Dental Nerve enters the dental canal in the inferior 

 maxillary bone, and gives sensory branches to the teeth. 



8. The Mental Nerve to the lower lip. 



Sixth Pair, Motores OcCUlorum. — This is a small nerve arising 

 from the anterior part of the medulla oblongata, just behind the pons 

 varolii. It proceeds in a forward direction in company with the superior 

 maxillary nerve in order to reach the foramen lacerura orbitale, by which 

 it enters the orbit with the ophthalmic division of the fifth. 



It gives off a small branch to the retractor muscle of the eye, and is 

 then distributed solely to the outer straight muscle of the eye (external 

 rectus). 



Seventh Pair, Portio Dura or Facial. — Arising from the medulla 



oblongata immediately ijehind the pons varolii in company witli the 

 eighth. 



From this point it is directed outward, and, with the eighth nerve, 

 enters at once the inter-nal auditory meatus. Then it passes into the 

 aqueduct of Fallopius, and gives off the chorda tympani nerve to join the 

 lingual, and soon emerges from the stylo-mastoid foramen of the petrous 

 temporal bone. Here it gains the under surface of the parotid gland,, 

 from which it reaches the face by passing between the gland and the 

 inferior maxilla below its condyle. It blends with the fibres of the sensory 

 subzygomatic branch of the inferior maxillary division of the fifth nerve 

 and forms a plexus (pes anserinus) on the outer side of the masseter muscle. 



This nerve supplies the ear and muscles about the poll, the upper 

 belly of the digastricus, the guttural pouch and parotid gland, the 

 stylo- maxillaris, the corrugator supercilii, the orbicularis palpebrarum, 

 the levator labii superioris alfeque nasi, and cervical panniculus, and 



