414 
M. J. 
GREENMAN 
The variability is shown by the following determinations: 
Number of fibers in right peroneal nerve—average of 15 cases. 
150.9 days. 
Number of fibers in left peroneal nerve—average of 15 cases. 
150.9 days. 
o 
Cc 
o 
C 
M (mean) 2038 
97 
4.7 
M (mean) 2032 
80 
3.8 
Average age 
Pp er ee 
Ce = = 0.57 
Average age 
mM, = + 13 
sa = == 9.9 
Ce= = 0.47 
A comparison of the average sectional areas of the 40 largest 
fibers of the right and left peroneal nerves shows that in four 
TABLE 6 
Series 15. Controls. Normal number and size of myelinated fibers in peroneal nerve 
2 AVERAGE SIZE OF FORTY LARGEST 
oR NUMBER FIBERS IN SQUARE MICRA 
ad an 
P c FIBERS 
STRAIN z E Right peroneal Left peroneal 
: 5 AEE é 2 gy aracaliiee | cs | eee es 
P lel E§ Riess Boia ose) | Naess ea ee 
325 | o| 1 |150) Inbred |242/34.5 1959|1892) 95.3/32.8/62.5} 99.9/34.3)/65.6 
328 o| 2 |151| Inbred |210/45.0 2279)2068/113 . 4/40. 7/72. 7/103 .1/39 .0|64.1 
340 | o&| 3 |152| Inbred |239/46.5) Neg. |2175|2131| 98.3/36.9|61.4) 97.8/36.0/61.8 
342 o| 4 |151) Inbred |274/69.5| Neg. |2078/2158|103 .5/38.6/64.9} 75.5/29.5/46.0 
347 | o| 6 |147| Inbred |245|55.0| Neg. |2040/2018) 77.4|30.0/47.4| 70.0/26.5|43.5 
380 | o| 13 }151| Inbred |256|55.5| Neg. |2123/2088] 98.7|39.0/59.7| 92.1/38.2|53.9: 
381 o| 13 |151| Inbred |283/53.5} Neg. |1985/2029|101 .3/43.7|57.6) 95.438 .2|57.2 
384 o| 14 |153; Inbred |276|33.0 Neg. 1931/1925] 99.4/44.0/55.4| 81.5|31.8/49.7 
385 | o| 14 |153| Inbred |256|35.0| Neg. |1887/2085| 89.7|/36.8/52.9| 89.5/39.0/50.5 
388 | 15 |151| Inbred |238/60.0| Neg. |1967|1985|101 .0/41 .4/59 6/103 . 5/41 .3/62.2 
394 | 18 |150| Inbred |276/53.0| Neg. |2045/2048/100. 2/40 .3/59.9| 97.1|37.2/59.9 
395 | o| 18 |150| Inbred |314/78.0| Neg. |2091/2134| 91.4/85.2/56.2| 90.6/35.2)/55.4 
403 o'| 21 |151| Inbred |266|85.5) Neg. |1982/2003|) 92.2/85.4/56.8)101 0/41 .9/59.1 
439 | 34 |151| Inbred |233/43 .0/ Neg. |1989]1897| 97.1/40.5/56.6) 82.9/32.2|50.7 
443 o'| 34 |151| Inbred |200/41.5] Neg. |2039|2025| 92.6/41.8/50.8] 92.9|37.4155.5 
Average 151 2038)2032| 96.8|/38.5|58.3] 91.5)/85.8|55.6 
40% 
39% |61% 
60% 
