Lesser petrosal nerve

The lesser petrosal nerve carries parasympathetic (secretory) fibers from both the tympanic plexus and the nervus intermedius, to the parotid gland. The tympanic plexus arises from glossopharyngeal nerve (CN IX) via Jacobson's nerve.

The lesser petrosal nerve originates at the geniculate ganglion, passing forwards through its own canal back into the middle cranial fossa. Here it is between the two layers of the dura mater, passing forwards to exit the skull via foramen ovale to eventually join the otic ganglion.

Anatomy: Brain

Anatomy: Brain

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Article information

rID: 1581
Section: Anatomy
Tag: cases
Synonyms or Alternate Spellings:
  • Lesser petrosal nerves

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Cases and figures

  • Figure 1: interconnection diagram
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  • Figure 2: right geniculate ganglion seen from above
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