134 Neurological Technique 



Corpus striatum, nucleus caudatus (caput), capsula interna, 

 nucleus lentiformis (putamen and globus pallidus). 



Capsula externa, claustrum, insula and gyri insulae. 



Commissura anterior, substantia perforata anterior, chiasma 

 opticum, and recessus opticus ventriculi tertii. 



Include all larger structures unmentioned, but occurring in 

 the section. 



What opposite lobi cerebri are connected by the commissura 

 anterior? What is the relation of the commissura anterior to 

 the capsula interna ? Identify and determine the office of the 

 foramen interventriculare (foramen of Monro). Explain the 

 change in the appearance of the section of the fornix. What 

 has become of the thalamus opticus ? 



Section ly, to pass through the rostrum corporis callosi and 

 the trigonum oMactorium. 



Draw, giving special attention to the following : 



Corpus callosum (genu), septum pellucidum, rostrum cor- 

 poris callosi, gyrus subcallosus, area parolfactoria (Broca's area), 

 and trigonum olfactorium (striae medialis and lateralis). 



Cornu anterius ventriculi lateralis, caput nuclei caudati, cap- 

 sula interna, nucleus lentiformis (putamen only), capsula externa, 

 and claustrum. 



Explain the fact that the fissura cerebri lateralis (Sylvii) 

 occurs twice in the section. What does the septum pellucidum 

 separate ? What produced the globus pallidus ? What must be 

 the shape of the ventriculus lateralis ? 



V. TORN PREPARATION OF PROSENCEPHALON. 



Use the half of the prosencephalon (cerebral hemisphere) 

 detached from the rhombencephalon in III, c, above. 



By means of the necessary tearing and teasing, determine 

 the relations between the structures mentioned in the following 

 groups : 



(«) Corpus callosum, centrum semiovale, and substantia 

 corticalis (cerebral cortex) . Leave the fornix intact. 



(^) Ventriculus lateralis, plexus choroideus, nucleus caudatus. 



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