102 



DISSECTION OF THE SUBMAXILLARY REGION. 



connected with the three trunks of the fifth nerve, and communicates with 

 sensory, motoiy, and sympathetic nerves. It is smaller in size than the 

 lenticular ganglion, is sometimes rather red, and is placed above the deep 

 process of the submaxillary gland. Offsets proceed upwards to connect it 

 with other nerves ; and from the lower part arise the branches to the ad- 

 jacent structures. 



Connection with nerves roots. Two or three branches, in the form of 

 loops, pass from the ganglion to the gustatory nerve. At the posterior 



Muscles : A. Genio-hyo-glossus. 



B. Genio-hyoitleus. 



C. Hyo-glossus. 



D. Stylo-glossus. 



E Mylo-hyoideus, reflected. 

 H. Stylo-hyoideus. 

 J. Posterior belly of digastricus. 

 Nerves: 1. Gustatory. 



2. Submaxillary ganglion. 



3. Wharton's duct. 



4. Glosso-pharyngeal nerve. 



6. Hypo-glossal. 



7. Upper laryngeal. The lingual ar- 



tery ramifies in this region, lying 

 by tbe side of the hypoglossal 

 nerve : the ranine offset is marked 

 with 9. 



DEEP VIEW OF THE SCBMAXILLARY REGION (Illustrations of Dissections). 



part the ganglion is further joined by an offset from the chorda tympani 

 (of the facial nerve) which lies in contact with the gustatory. And its 

 sympathetic branch comes from the nerves around the facial artery. 



Branches. From the lower part of the ganglion five or six branches 

 descend to the substance of the submaxillary gland ; and from the anterior 

 part other filaments are furnished to the mucous membrane of the mouth 

 and the Whartonian duct. 



Chorda tympani. Joining the gustatory above by fibrils (p. 97), it is 

 applied to the back of that nerve till near the tongue, and can be easily 

 separated from it ; but beyond that point it enters amongst the fibres of 

 the gustatory nerve and is conveyed to the tongue. Near the submaxil- 

 lary gland an offset is sent to the submaxillary ganglion. 



The HYPO-GLOSSAL or NINTH NERVE (fig. 23, 6 ) in the submaxillary 

 region lies on the hyo-glossus muscle, being concealed by the mylo- 

 hyoideus : but at the inner border of the hyo-glossus it enters the fibres 

 of the genio-hyo-glossus, and is continued along the middle line of the 

 tongue to the tip. 



Branches. On the hyo-glossus the ninth nerve furnishes branches to 

 the muscles of the submaxillary region, except the mylo-hyoid and the 

 digastric, viz., to the hyo-glossus, stylo-glossus, genio-hyoideus, and genio- 

 hyo-glossus. Further, some offsets communicate with the gustatory nerve 

 on the hyo-glossus. 



Along the middle of the tongue the nerve sends upwards long filaments 



