264 LABORATORY MANUAL OF HUMAN ANATOMY 



The other branches have been already studied, viz. 

 (acb) Parotid rami (rami parotidei). 

 (ace] Anastomotic with the facial (rami anastomotici 

 cum N. faciali). 



(acd) Anterior auricular (Nn. auriculares anteriores). 



(ace) Superficial temporal rami (rami temporales super- 



ficiales ) . 



(ad) Lingual nerve (N. lingualis) (branches studied later). 



(ae) Inferior alveolar nerve (N. alveolaris inferior) (0. T. in- 



ferior dental). 



(aea) Mylohyoid nerve (N. mylohyoideus) . 

 Other branches studied later. 



(b) Chorda tympani of N. intermedius. 



(c) Otic gangiion (ganglion oticum). This can be exposed now, but 



can be better studied later. 



Mandibular Canal. 



The mandibular canal (canalis mandibularis) (0. T. inferior 

 dental canal) is somewhat difficult to open. 



With Hey's saw, mallet and chisel, and bone-forceps remove 

 the outer compact layer of the mandible so as to expose the con- 

 tents of the canal. Study the following: 



(a) Inferior alveolar artery (A. alveolaris inferior) (0. T. inferior 



dental). 



(aa) Mylohyoid ramus (ramus mylohyoideus) (not in the canal). 



(ab) Mental artery (A. mentalis). 



(b) Inferior alveolar nerve (N. alveolaris inferior) (0. T. inferior 



dental). 



(ba) Inferior dental plexus (plexus dentalis inferior). 



(baa) Inferior dental rami (rami dentales inferiores). 



(bab) Inferior gingival rami (rami gingivales inferiores). 



(bb) Mylohyoid nerve (N. mylohyoideus) (not in the canal). 

 (be) Mental nerve (N. mentalis). 



(bca) Rami to chin (rami mentales). 



(bcb) Rami to lower lip (rami labiales inferiores). 



SUBMAXILLAEY EEGION. 



Draw the tongue forcibly forward and stitch the tip of it to 

 the end of the nose. Throw the head backward to the full extent 

 and turn slightly to the opposite side. 



Mylohyoid Muscle (M. mylohyoideus) and Subjacent Structures. 



^ The structures which have been dissected, cut superficial to 

 this muscle, may now be reflected. Clean the muscle. Study its 

 form, position, origin, insertion, action, and innervation. Cut 



