702 



THE CEREBRUM 



by motor or sensory defects of any kind. Mott and Schaeffer, l how- 

 ever, have shown that its stimulation gives rise to symmetrical move- 

 ments on the two sides of the body. Moreover, there is sufficient 

 experimental evidence at hand to prove a distinct localization of these 



Central fissure 

 Posterior central gyrvs 

 Anterior central gyrus 



Corpus callosum 

 Fornix 



Lateral ventricle 

 Thalamus 



Caudate nucleus 

 Internal capsule 



3rd nerve 

 Corp. mamiUare 

 5th nerve 



Sttbthalamic nucleus 

 Lentiform nucleus 

 Iniuta 



Second temporal gyru* 

 First temporal gyms 



Claustrum 

 Inferior ham of lot. tnt. 



Hippocampal fsture 

 Optic tract 

 'Hippocampal gyrvs 



Uncus 



Cerebral pedunclt 

 Pans 

 Pyramid of. medulla oblongata. 



FIG. 350.- 



-VlEW FROM THE FRONT OF A CORONAL SECTION OF AN ADULT BRAIN MADE 



THREE INCHES BEHIND THE FRONTAL POLE. (J. Symington.) 



fibers, because their stimulation evokes successively movements of 

 the eyes, head, trunk, shoulder, arm, fingers, hip, tail and foot. 



Obviously, therefore, this commissure forms a connection between 

 the two motor areas for the association of symmetrical points of these 

 regions. This fact may be substantiated by the ablation of one motor 



1 Brain, xiii, 1890, 174. 



