Do axons grow during adulthood? A study of caliber and microtubules of sural nerve axons in young, mature, and aging rats.


Calibers and microtubules of sural nerve axons were studied in young (6-week-old), mature (14-week-old), and aging (2-year-old) rats. The mean cross-sectional area of nonmedullated fibers was about 0.50 micron 2 (range: 0.47-0.52) in the three age groups. Their caliber spectra were also similar. In contrast, myelinated axons grew from 6.6 to 16.7 micron 2… (More)


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