Stowell.] 4-bo [May 21, 



spherical tensor tympani muscle. This nerve does not seem to be incor- 

 porated with the ganglion. 



G. oticum: Otoganglium ; G. auriculare ; Auricular ganglion, Ganglion 

 of Arnold, etc. (Fig. Otic.) 



Upon the tensor tympani nerve just dorsad of the carotid artery, at the 

 hiatus fallopii, is a small pinkish ganglion, oval in outline, about 2 mm. 

 in long diameter. It is related by anastomotic filaments with the sympa- 

 thic plexus (Sym.) around the carotid artery ; with the auriculotempo- 

 ral nerve by a twig dorsad of the carotid artery (Fig. root) ; the artery 

 appears to pass between the two roots (?) of the nerve, the ganglion being 

 at their confluence. Two slender fascicles from the otic ganglion enter the 

 hiatus fallopii and join the facial nerve. (Fig. Pe.) 



NERVUS MAXILLARIS. 



General Description: This is the middle ramus of the trigeminus ; it is 

 intermediate in size between the other rami ; its course is immediately 

 cephalad from the Gasserian ganglion through the foramen rotundurn, the 

 foramen of exit. The ectocranial trunk crosses the spheno- palatine space, 

 lies along the infraorbital fossa, and penetrates the infraorbital foramen. 

 In its course it is dorsad of the maxillary artery. The length of the trunk 

 from the ganglion Gasseri to the foramen iufra-orbitale is about 40 mm. 



It supplies the integument of the forehead, cheek, dorsal lip, side of the 

 nose ; the vibrissse, conjunctiva, lachrymal gland, maxillary teeth, palate, 

 pharynx, and the membrane over the turbinated bones. 



Detailed Description and Rami: N. maxillaris (Fig.), at the foramen of 

 exit, is about 2 mm. in diameter ; at its ganglionic origin G. gasseri, it is 

 somewhat intumescent ; upon the ventral surface of this enlargement it 

 receives a considerable filament from the large superficial petrosal of the 

 facial. This anastomotic filament lies obliquely across the ventral surface 

 of the Gasserian ganglion, and penetrates the rete carotideum to reach the 

 nerve. The central 5 mm. of its ectocranial course is involved in a dense 

 rete of the carotid artery and the carotid plexus, from which plexus it 

 aeems to receive filaments. The distribution of the nerve is given in the 

 description of the rami. 



N. orbitalis (Fig.) is the first ramus of the ectocranial trunk, and is 

 given off at the foramen of exit ; its course is dorsad, and extends about 2 

 mm., being involved throughout its course in the rete already described ; 

 it is the common origin of N. temporalis and N. malaris, q. v. 



N. temporalis (Fig. Tmp.) is the caudal ramus of the orbital nerve ; its 

 general course is toward the post-orbicular process (processus post orbicu- 

 laris) ; 2-5 mm. peripherad of its origin it divides into cephalic and caudal 

 rami. 



R. cejyhalicus (Fig. Tmp. ce.), the larger ramulus, 1 passes ventnul of the 

 post-orbicular process, and is distributed to the conjunctiva and integu- 

 ment of the dorsal lid, and to the lachrymal gland; it sustains anastomotic 

 relations with the palpebral nerve. 



