REGENERATION OF NERVE 



803 



sutured both to its own distal end and to the distal end of an adjacent 

 nerve-trunk, the sum of the nerve-fibres in the two distal trunks after 

 regeneration has occurred is greater than the number of fibres in the 

 central stump (Kilvington). That this is due to splitting of axons is 



Fig. 281. Two-day-old Culture of Spinal Ganglia of a Guinea Pig Six Days Old 



(Ingebrigtsen). 



Fig. 282- Microphotograph of Nerve Fibres from the Sciatic Nerve of a Rabbit, 

 incubated in Plasma for Twelve Days. Hardened in formalin and stained 

 with hasmatoxylin. No trace of Wallerian degeneration (Ingebrigtsen). 



shown by the fact that an axon reflex (p. 913) can be elicited on dividing 

 one of the distal trunks and stimulating its central end after complete 

 separation of the proximal or parent stem from the central nervous 

 system. Even when the second path offered to the regenerating motor 

 axon is a sensory path, bifurcation of the axon occurs, one branch 



