Charles Eussell Bardeen 315 



In an interesting communication by P. An eel and L. Sencert/ these 

 authors take exception to the terms " anterior " and " posterior " or 

 " pre-fixed " and " post-fixed " as applied to the various types of varia- 

 tion in origin found in the lumbo-sacral plexus and the neighboring 

 nerves. It must be admitted that local variation in the place and extent 

 of origin of the border-nerves, and the nerves of the limb is more fre- 

 quent than is marked variation in the relation of all of these nerves as 

 a group to the segmental spinal nerves. The correlation, however, 

 often found between variation in origin of the border-nerves and the 

 position of the lumbo-sacral plexus on the one hand and the develop- 

 ment of the spinal axis upon the other, makes it seem well to retain the 

 terms " anterior " and " posterior " in describing variation in origin of 

 these nerves. 



1 Contribution a I'etude dn plexus lumbaire cbez I'bomme, Bibliograpbie anatomique 

 IX, 1901, p. 209. 



