DISSECTION OF THE HEAD AND NECK 317 



(kg) Transverse muscle of tongue (M. transversus linguae), 

 (kh) Vertical muscle of tongue (M. verticalis linguae). 

 (I) Septum of tongue (septum linguae), 

 (m) Nerves of tongue (to be studied on left side of tongue). 

 (ma) Glossopharyngeal nerve (N. glossopharyngeus). 



(maa) Lingual rami (rami linguales). 

 (mb) Lingual nerve (N. lingualis). 



(mba) Sublingual nerve (N. sublingualis) . 

 (mbb) Lingual rami (rami linguales). 



Read on the relations of the N. trigeminus and 

 the N. intermedius, respectively, to the N. lingualis. 

 (me) Hypoglossal nerve (N. hypoglossus) . 



(mca) Lingual rami (rami linguales). 



What do they innervate? 

 (n) Lingual artery (A. lingualis). 



(na) Dorsal rami of tongue (rami dor sales linguae), 

 (nb) Deep artery of tongue (A. profunda linguae) (0. T. ranine 

 artery). 



BRAIN (ENCEPHALON). 



The student should now undertake the systematic study of 

 the brain. 



Membranes of Brain (Meninges encephali). 



(a) Dura mater of the brain (dura mater encephali). This has been 



examined before (p. 198). 



(b) Arachnoid of brain (arachnoidea encephali). 



(ba) Subarachnoid cavity (cavum subarachnoideale) . 



(bb) Subarachnoid cisterns (cisternae subarachnoideales) . 

 Divide the arachnoid in the middle line over the anterior surface of 



the medulla oblongata and pons, and turn the two halves lateralward. 



(bba) Cerebellomedullary cistern (cisterna cerebellomedul- 



laris) (0. T. cisterna magna). 



(bbb) Cistern of the lateral fossa of the cerebrum (cis- 



terna fossae lateralis cerebri [Sylvii]). Note 

 relation to A. cerebri media. . 



(bbc) Cistern of the chiasm (cisterna chiasmatis). 



(bbd) Interpeduncular cistern (cisterna interpeduncularis) 



(0. T. cisterna basalis). 



(bbe) Cistern of the large veins of the cerebrum (cisterna 



venae magnae cerebri). 



(be) Arachnoideal granulations (granulationes arachnoideales 

 [Pacchioni]) (0. T. Pacchionian bodies).. (Vide Fig. 84.) 



(c) Pia mater of brain (pia mater encephali). Study this in its relation 



to the surface of the brain. The portions of the pia in the interior 

 of the brain will be studied later on. 



