Morphologic and morphometric study of the facial nerve in clinically normal adult dogs
1991
Braund, K.G. | Mehta, J.R. | Amling, K.A. | Toivio-Kinnucan, M.
A morphologic and morphometric study was carried out on the facial nerve: to determine normal histologic data in myelinated fibers of clinically normal young adult dogs; to establish reference values for mean fiber diameter, and to delineate the relative diameter frequency distribution curve. Few degenerative changes were observed in single teased-nerve fibers and semithin cross-sectional nerve preparations. Statistical difference was not observed between left and right facial nerves. The distribution of fiber diameters in the facial nerve was unimodal. Mean (+/- SD) fiber diameter of the facial nerve was 3.92 +/- 1.18 micromole. Approximately 89% of fibers in the facial nerve had diameter between 3 and 6 micromole. Fiber diameter ranged from 2 to 12 micromole; however, < 1% of fibers had diameter > 8 micromole.
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