A LABORATORY OUTLINE OF NEURO-ANATOMY 



359 



stroke split the specimen lengthwise in the median plane. This provides two prepara- 

 tions for dissection, which should be used by two students. 



Pineal body 



Third ventricle 

 Hypothalamus 



Thalamus 



Chorioid plexus of lateral 

 ventricle 



Lateral ventricle 

 Corpus striatum 



Lamina terminalis 



Rhinencephalon 



Hypophysis 



Tongue 



Fig. 258. Medial sagittal section of the head of a 35 mm. pig embryo. (Redrawn from Prentiss- 



Arey.) 



22. First study the medial section of the brain, noting the five divisions of the 

 brain, the ventricles, and the relation of the cerebral hemispheres to other parts of the 



Cerebral aqueduct 



Lamina quadrigemina 

 Cerebral peduncle 

 Cerebellum 

 Chorioid plexus of fourth ventricle 



Fourth ventricle 

 Medulla oblongata 



Central canal of spinal 

 cord 



Semilunar ganglion N. V 

 Mesencephalon 



Cerebellum 



Hypothalamus 



Geniculate gang. N. VII 



Ganglion N. VIII 



Medulla oblongata 



Jugular gang. N. X 



Gang, of Froriep 



Gang. N. cerv. I 



Accessory nerve 



Hypoglossal nerve 



Ganglion nodosum N. X 



Gang. N. cerv. V 



Cerebral hemisphere 



N. V, ophthalmic N. 



Rhinencephalon 



N. opticus 



N. V, maxillary N. 



N. V, mandibular N. 



Chorda tympam 

 Facial N. 



Fig. 259. Dissection of the head of a 35 mm. pig embryo. Lateral view. (Redrawn from 



Prentiss-Arey.) 



brain (Fig. 258. See also Figs. 16, 17 and pp. 32-36). Of what three parts is the 

 cerebral hemisphere composed? Locate each of the subdivisions of the diencephalon. 



