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ANNALS NEW YORK ACADEMY OF SCIENCES 



as a graph of fiber diameter against the amount of time allowed for re- 

 generation after suture of the tibial nerves. The leveling off of the 

 diameter growth curve at a level between 14 and 16 micra again illus- 

 trates the incomplete "maturation" of fibers, even after long periods 

 of regeneration. 



The Relationship between the Conduction Velocity and the 



Fiber Diameter 



The results from both the action potential and the fiber diameter 

 studies showed a gradual recovery, which tapered off with no complete 



100 



"--Tibial 

 • ^Peroneal 

 A = Saphenous 



6 8 10 12 



Tibep diametep - /j. 



Figure 4. Graph showing the relationship between the maximum conduction velocities and the 

 outside diameters of regenerating fibers of the nerves: tibial (crosses), peroneal (circles), and 

 saphenous (triangles). (Berry, Grundfest, & HinseyJ) 



return of either the velocity of impulse conduction or the size of the 

 fibers. The actual relationship between the two functions is shown in 

 FIGURE 4, where the maximum conduction velocity is plotted against 



