greater petrosal nerve


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great·er pe·tro·sal nerve

[TA]
a branch from the genu of the facial nerve exiting via the hiatus of the facial canal and running in a groove on the anterior surface of the petrous part of the temporal bone beside the foramen lacerum to join the deep petrosal nerve, thus forming the nerve of the pterygoid canal, which passes through the pterygoid canal to reach the pterygopalatine ganglion.

great·er pe·tro·sal nerve

(grā'tĕr pĕ-trō'săl nĕrv) [TA]
A branch from the genu of the facial nerve exiting by way of the hiatus of the facial canal and running in a groove on the anterior surface of the petrous part of the temporal bone beside the foramen lacerum to join the deep petrosal nerve, thus forming the nerve of the pterygoid canal, which passes through the pterygoid canal to reach the pterygopalatine ganglion.
Synonym(s): greater superficial petrosal nerve, nervus petrosus major, parasympathetic root of pterygopalatine ganglion.

great·er pe·tro·sal nerve

(grā'tĕr pĕ-trō'săl nĕrv) [TA]
A branch from the genu of the facial nerve exiting by way of the hiatus of the facial canal and running in a groove on the anterior surface of the petrous part of the temporal bone beside the foramen lacerum to join the deep petrosal nerve, thus forming the nerve of the pterygoid canal, which passes through the pterygoid canal to reach the pterygopalatine ganglion.
Synonym(s): greater superficial petrosal nerve, nervus petrosus major, parasympathetic root of pterygopalatine ganglion.
References in periodicals archive ?
All 64 patients had a permanently non-crying eye on the involved side as a result of the excision of the greater petrosal nerve. This result is expected, and patients are apprised of it before surgery.
The temporal lobe dura was elevated, and bone was removed from the greater petrosal nerve, geniculate ganglion, internal genu, labyrinthine portion of the facial nerve, and upper portion of the internal auditory canal until a good view was obtained into the cerebellopontine angle.
The greater petrosal nerve was severed so that a 1-cm segment of this nerve was excised along with the geniculate ganglion.

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