Crossing facial branch
Embryology of the Facial Nerve
foramen, the following nerves branch off the facial nerve: gland where the marginal branch would be seen crossing it.
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Facial artery - Wikipedia
The facial artery is a branch of the external carotid artery that supplies structures of the The branches of the facial nerve cross the artery from behind forward.
Description:In the pterygoid canal, the greater petrosal nerve joins the deep petrosal nerve to become the nerve of the pterygoid canal. The nerve lies against the medial wall of the tympanic cavity, above and posterior to the oval window. The facial nerve runs superiorly cephalad along the roof of the IAC. The 3 branches that exit from the mastoid segment of the facial nerve are 1 the nerve to the stapedius muscle, 2 the chorda tympani nerve, and 3 the nerve from the auricular branch of the vagus. The second genu is lateral and posterior to the pyramidal process. In cases in which the lateral canal is difficult to identify eg, cholesteatoma, tumor , the use of other landmarks, along with cautious exploration, is advised.