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petrosal nerve

   Also found in: Wikipedia 0.03 sec.
petrosal nerve [pə′trō·səl ‚nərv]
(neuroscience)
Any of several small nerves passing through the petrous part of the temporal bone and usually attached to the geniculate ganglion.


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Furthermore, posterior transposition requires severing the chorda tympani and greater superficial petrosal nerves, which results in transient dysgeusia and an ipsilateral dry eye.
The geniculate ganglion is located by identifying the greater petrosal nerve at the facial hiatus and following it posterolaterally with a small diamond drill and constant suction and irrigation.
5) In the middle ear or mastoid portion of the temporal bone, an intracranial meningioma can extend along the path of least resistance through a tegmen tympani to dehiscence, the sulci of the greater and lesser superficial petrosal nerves, the sigmoid sinus plate, the geniculate ganglion area, the internal auditory canal, the lateral semicircular canal, and the perilabyrinthine cell tracts or jugular foramen.
 
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