Jacobson nerve

Jacobson nerve is the tympanic branch of the glossopharyngeal nerve (CN IX) and arises from the inferior ganglion of the glossopharyngeal nerve. It also carries preganglionic parasympathetic fibres, from the inferior salivary nucleus, which eventually enter the otic ganglion

Jacobson nerve enters the middle ear cavity via the inferior tympanic canaliculus and contributes to the tympanic plexus located on the cochlear promontory. The parasympathetic fibres leave the plexus as the lesser petrosal nerve.

The neuroendocrine cells related to this nerve give rise to glomus tympanicum tumours.

History and etymology

The nerve is named after Ludwig Jacobson, a Danish anatomist.


Neuroanatomy
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Article Information

rID: 1531
Section: Anatomy
Synonyms or Alternate Spellings:
  • Jacobson's nerve
  • Tympanic branch of glossopharyngeal nerve

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    Figure 1: diagram of Jacobsen nerve
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