732 HUBER. [Vol. XI. 



favorable as when an implanted nerve segment is carefully- 

 sutured to the central stump ; in the latter case the fibres of 

 the implanted piece are brought end to end with the fibres of 

 the central end, in the former not ; (c) The down-growing 

 axis cylinders of the central end bud into the fibrous tissue 

 and not into the reflected flap. 



VIII. Regeneration through an engrafted connection between 

 the peripheral part of a divided nerve and an accompanying 

 uninjured nerve trunk is not possible. 



IX. In the Letievant-Tillmanns operation (cross-suturing 

 the long ends of two divided nerves and engrafting the short 

 ends to the accompanying long stump) regeneration of but 

 one of the peripheral segments of the two injured nerves can 

 be hoped for ; the other peripheral segment remains degener- 

 ated ; as there is no reason why a regeneration of both the 

 peripheral stumps may not be attained after the implantation 

 of a nerve segment between the respective ends of the two 

 injured nerves, preference should be given to the latter 

 method. 



