Nerves, Spinal Coed, Brain and Other Ganglia 



79 



The pons, medulla, mid-brain and thalami together make up the brain- 

 stem. 



It is important to distinguish certain parts and cavities of the brain, 

 even if we make but a simple study of its structure, nervous connections 

 and probable functions. 



Plexus chorioideus venlriculi tertii 

 Ventriculus tertius • 



Thalamus (Fades medialis) j ; 

 Sulcus hypothalamicus (Monroi) i < j 

 Adilus ad aquaeduelum cerebri ! j ; 



Commissura posterior (cerebri), [ I ' ' { I 



Commissura habcnularum, / 



Recessus pinealis 



Recessus suprapineal \ 



Corpus pineale 

 V cerebri magna. (Galcni) 



l.amina quadrigemina 

 Aquaeductus cerebri 

 Decussatio brachii conjunctiva 



Velum medullare anteriu 



Fasciculus longitudi- 

 nalis medhili 



Ventriculus quartus 



Fastigium 



Vermis 



Tela chorioidea ventriculi tertii 



Corpus fornicis 



' Foramen interventriculare 



j / (Monro!) 



/ / f Septum pellucidum 



Rostrum corporis 

 callosi 



Gyrus sub- 

 call osus 



Commissura 

 anterior 



',. Hypothalamus 



___ Lamina terminalis 

 Recessus opticus 



Chiasma opticum 



•— - Recessus infundibuli 

 ^— - - Infundibulum 



_ Hypophysis (Lobus anterior 

 und posterior) 

 * Corpus mamillare 

 v - Nervus oculomotorius 

 \ \ \ Recessus anterior 

 \ \ 'Fossa interpeduncularis (Tarini) 

 \ 'Sulcus n. oculomotorii 

 \ iRecessus posterior 

 Pons (Varoli) (Fibrae superficiales) 

 \ \ \ Fasciculi longitudinales (pyramidales) 

 > \ "Foramen caecum 



\ Pyramis medullae oblongatae 

 1/ \ 

 ', ' Raphe medullae oblongatae 



Decussatio pyramidum 



' Medulla spinalis 



Fig. 67. Medial section of brain stem and cerebellum. (Toldt, Anatomischer 

 Atlas.) 



In all of these parts we find nerve cells, and also their axons and den- 

 drites. The cell bodies are in general collected in the cortex or external 

 portions of the cerebellum and cerebrum, and in groups scattered through 



Hemisphaerium 



cerebelli 18 1 



Laminae medullares'f'  1 



Plexus chorioideus ventriculi quarli' 



Calamus scriptorius 



