PREFACE 



THE author hopes that the present edition of this work may 

 receive from his colleagues the same generous consideration 

 accorded to the former editions. His endeavor has been to set 

 forth the present status of the anatomy of the human brain and 

 spinal cord. To do this the facts have been gleaned from many 

 sources; and, so far as was possible, from the original sources. 

 Being designed for a text-book, the subject-matter is presented 

 in the order found convenient to the dissector. The description 

 proceeds from the gross structures to the constituent neurones in 

 each successive region. Wherever the embryology will assist the 

 student to comprehend the adult forms, the development is briefly 

 given in the text ; but a special chapter is also devoted to embry- 

 ology, which presents a concise and connected statement of the 

 development of the entire brain and spinal cord. 



The special objects held in view throughout the book are the 

 location of functional centers and the tracing of their afferent, 

 associative and efferent connections. Particular emphasis is laid 

 upon the origin, course, termination and function of conduction 

 paths as they are met in the regular study, and the more im- 

 portant and better known of these paths are summed up in a 

 final chapter on the tracing of impulses. Function is everywhere 

 correlated with structure; and so far as present knowledge per- 

 mits, the function of each group of neurones is given in connec- 

 tion with its anatomical description. 



The BNA Nomenclature is followed almost without excep- 

 tion, the English equivalents of the Latin terms being very largely 

 employed. 



Keeping pace with the lectures, every student is expected to 

 dissect the human brain in the laboratory, exposing, studying and 

 sketching every macroscopic structure as it occurs in the work; 



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