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LABORATORY MANUAL OF HUMAN ANATOMY 



through the muscle close to the linea obliqua mandibulae and 

 along the median raphe and turn it downward over the hyoid 

 bone. Saw through the corpus mandibulae a little lateral from 

 the median line. Lift the edge of bone and fasten it by a suture 

 to structures above. Avoid injury to the mucous membrane in 

 the floor of the mouth. 



Beneath the mylohyoid muscle study carefully the following : 



Muscles. 



(a) Hyoglossus muscle (M. hyoglossus). 



(b) Styloglossus muscle (M. stylo glossus). 



(c) Genioglossus muscle (M. genioglossus}. 



(d) Geniohyoid muscle (M. geniohyoideus) . 



FIG. 113. 



A. maxillaris externa, 

 M. massetericus 



M. stylohyoideus 

 Gl. parotis 



Gl. submaxillaris 

 .M. hyoglossus 



.M. mylohyoideus 



M. digastricus 



A. lingualis 



M. omohyoid. 



V. facialis posterior M . thyreohyoideus 



N. hypoglossusi ^A. thyreoidea superior 



A. carotis externa: ! N. laryngeus superior 



The structures in the submaxillary region. (After Haeckel in Atlas des Topograph. Anat. des 

 Mensch. v. Bardeleben, Haeckel, and Frohse-Jena, 1901, Fig. 49.) 



Nerves. (Fig. 112.) 



(a) Lingual nerve (AT. lingualis). 



(aa) Sublingual nerve (N. sublingualis). 



(ab) Lingual rami (rami linguales). 



(b) Hypoglossal nerve (N. hypoglossus). 



(ba) Lingual rami (rami linguales) . 



What muscles are innervated by the N. hypoglossus? 



(c) Submaxillary ganglion (ganglion submaxillare) . 



