Fibers in monkey posterior articular nerves
作者:
Ernest Gardner,
Nicholas J. Lenn,
期刊:
The Anatomical Record
(WILEY Available online 1977)
卷期:
Volume 187,
issue 1
页码: 99-106
ISSN:0003-276X
年代: 1977
DOI:10.1002/ar.1091870107
出版商: Wiley Subscription Services, Inc., A Wiley Company
数据来源: WILEY
摘要:
AbstractThe distribution of axons in the posterior articular nerves in rhesus monkey has been studied in terms of ratio of myelinated to unmyelinated fibers, and size of myelinated fibers. Conduction velocity measurements were also made. The nerves contained 2,000 to 2,200 unmyelinated fibers of 0.2 to 1.2 μm. diameter. They contained 399 to 478 myelinated fibers, varying in size from 1.4 to 12.3 μm. Thus 80 to 85% of fibers in these nerves were unmyelinated. The maximum conduction velocity of 70 to 80 meters per second corresponded to an initial small deflection, with most fibers conducting at slower rates. These results are compared to previous reports which severely underestimated the number of unmyelinated fibers because electron microscope counts were not utilized.It is suggested that pain fibers from the knee joint of monkey make up much of this large population of unmyelinated axons. An unknown number of post‐ganglionic sympathetic fibers is also included in the unmyelinated fiber gr
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