BIBLIOGRAPHY OF THE BRAIN. 531 



that an interruption takes place by means of nerve corpuscles, 

 must nevertheless take place in the continuity of the fibres. 

 Clarke and Lenhossek believe they are able to corroborate the 

 view of Burdach, that the pyramids, besides decussating in the 

 lateral columns, are also directly continued into a definite part 

 of the anterior columns of the spinal cord (Burdach's funda- 

 mental fasciculus of the pyramids), whilst Stilling and Deiters 

 are unable to perceive any such continuation of the pyramids. 

 As in the sensory decussation of the pyramids the posterior 

 nerve roots originating at the same level were represented, so 

 Clarke points out that the fasciculi proceeding from the in- 

 ferior decussation of the pyramids into the anterior cornu of 

 the grey substance represent the anterior roots of the nerves 

 arising at the same level. With the continuation of the most 

 inferior decussating fasciculi of the pyramids into the lateral 

 column of the projection system, both in regard to structure 

 and the arrangement of its grey matter, the type of the spinal 

 cord is attained. And inasmuch as the fasciculi of the lateral 

 column do not participate in the decussation in the anterior 

 commissure of the spinal cord, they do not experience, between 

 their pyramidal course and the passage into the anterior roots, 

 any re-decussation, and are clearly enough adapted for the 

 further conduction of the crossed influence of the cerebral lobes 

 upon the musculature.* 



BIBLIOGRAPHY 



OF THE BRAIN AS A WHOLE. 



K. F. BURDACH, Vom Baue und Leben des Gehirnes. (On the 

 structure and life of the brain.) Leipzig, 1822, Band ii. 



F. ARNOLD, Handbuch der An atomic des Menschen. (Manual of 

 human anatomy.) Freiburg, 1822, Band ii. 



* At the conclusion of the preceding account of the structure of the 

 cerebrum, it becomes a pleasant duty on my part to express my thanks 

 for the intelligent artistic co-operation of Dr. Carl Heitzmann and of Mr. 

 Adolf Gohre, of Vienna, of whom the former has carefully drawn to 

 nature figs. 230237, 239, 240, 243246 and 259, whilst the latter has 

 executed on wood the remaining still more numerous drawings. 



MM 2 



