346 NEUROLOGY, OR ANATOMY OF NERVOUS SYSTEM 



Outside the cranium: it sends branches to the glossopharyn- 

 geal, carotid plexus, auricularis magnus, auriculotemporal, and 

 facial nerves. 



Branches of Distribution. In the aqueduct: a tympanic branch 

 to the stapedius, and the chorda tympani. The latter arises close 

 to the stylomastoid foramen, ascends in a small canal to the 

 posterior wall of the tympanum, and then passes over the upper 

 part of the membrane between the handle of the malleus and 

 the incus, finally emerging through the canal of Huguier; it 

 then descends on the inner side of the internal lateral ligament 

 of the jaw, and joins the gustatory nerve, through which its 

 fibers reach the submaxillary ganglion and lingualis muscle. It 

 receives a branch from the otic ganglion before joining the 

 lingual. 



Outside the Cranium. The posterior auricular ascends between 

 the ear and the mastoid, receives a branch from the vagus, one 

 from the auricularis magnus, and one from the occipitalis minor, 

 and divides into an auricular branch to the back of the auricle 

 and retrahens, and an occipital branch to the occipitofrontalis. 



The digastric branches, to the posterior belly of the digastric, 

 one joining the glossopharyngeal nerve; and a stylohyoid branch 

 to the muscle, joining the carotid plexus. 



The temporofacial division crosses the external carotid artery 

 and the temporomaxillary vein in the upper part of the parotid, 

 receives filaments from the auriculotemporal nerve, and divides 

 into three sets of branches, viz., temporal, malar, and infra- 

 orbital. 



The temporal branches supply the attolens and attrahens, 

 occipitofrontalis, orbicularis, and corrugator supercilii. They 

 communicate with the auriculotemporal, temporal branch of 

 the superior maxilla, and supraorbital nerves. 



The malar branches run to the outer angle of the orbit, supply 

 the orbicularis and- corrugator, joining the lacrymal and supra- 

 orbital, and some, to lower lid, join with the superior maxillary 

 nerve (palpebral branches). 



The infraorbital group, to the space between the orbit and 

 mouth. They supply the buccinator, orbicularis oris, the 

 levator labii superioris, the levator anguli oris, and nasal 

 muscles. They unite with the cervicofacial branches, the nasal, 

 infratrochlear, and with the superior maxillary nerve. The 

 latter forms the infraorbital plexus. 



