AnXHOR'S ABSTRACT OF THIS PAPER ISSUED 

 BY THE BIBLIOGRAPHIC SERVICE FEBRUARY 2 



THE BRACHIAL PLEXUS OF NERVES IN MAN, THE 



VARIATIONS IN ITS FORMATION AND 



BRANCHES 



ABRAM T. KERR 



From the Department of Anatomy, Cornell University Medical College, Ithaca, N. Y. 



TWENTY-NINE FIGURES 



INTRODUCTION AND METHODS 



This paper is based upon records of dissections from the 

 Anatomical Laboratory of the Johns Hopkins Medical School 

 during the years 1895 to 1900, and from the Anatomical Labora- 

 tory of the Cornell University Medical College, Ithaca, at inter- 

 vals from 1900 to 1910. 



The dissections were made in most cases by the regular medical 

 students who, after uncovering the peripheral nerves with much 

 care, made records and diagrams of the course, relations, and 

 connections of these nerves. 



The dissections were carefully supervised by the instructors 

 as well as by the persons in charge of this investigation. These 

 latter always compared minutely the drawings with the dissec- 

 tion, corrected errors, and wherever necessary made more com- 

 plete dissections and worked out the finer details. They also 

 recorded the character and accuracy of the dissection and 

 drawing. 



The diagrams were compared with the dissections and verified 

 by Dr. A. W. Elting from 1895 to 1897 and by Dr. C. R. Bardeen 

 from 1897 to 1899. The Johns Hopkins records in 1899 to 1900 

 as well as all the Cornell records were verified by the writer. 



From 1895 to 1899, the Elting printed tabular Hsts of the 

 names of the nerves were used. These were so arranged that 

 the relations and connections of the nerves could be indicated 



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THE AMERICAN JOURNAL OF ANATOMY, VOL. 23, NO. 2 



