Abstract

AbstractElectron microscopic analyses of the greater petrosal nerve, the deep petrosal nerve and the nerve of the pterygoid canal near the point of their union in the mouse were made to clarify the courses of their fibers. Most of the nerve fibers of the greater and deep petrosal nerves passed through into the pterygoid canal nerve, but in some specimens a few nerve fibers (less than 100) coursed from the deep petrosal nerve to the greater petrosal nerve or conversely. Therefore, except for these, the source of the unmyelinated fibers of the greater petrosal nerve from the deep petrosal nerve may be eliminated; these fibers may be derived from the facial nerve proximal to the greater petrosal nerve.

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