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Age changes in conduction velocity of unmyelinated fibers
Author(s) -
Hopkins A. P.,
Lambert E. H.
Publication year - 1973
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901470408
Subject(s) - nerve conduction velocity , biology , growth velocity , anatomy , trunk , endocrinology , ecology
Increase of conduction velocity of unmyelinated fibers has been measured in the cervical sympathetic trunk of growing rats. Fibers in this nerve are almost all unmyelinated.1 Conduction velocity is about half adult values at ten days after birth. The velocity in some nerves reaches the adult range by 50–80 days. There is evidence that the velocity of many fibers other than the fastest also reaches the adult range by this age. 2 During the period of growth from 10–112 days of age, velocity increases in direct proportion to the increase in length of the nerve.