Lesser petrosal nerve

Jacobson anastomosis as a fiber orientation of the nerve fibers is referred to the head, which serves to parasympathetic innervation of the parotid gland.

Course

The preganglionic ( lying in a ganglion before switching ) nerve fibers originate in the inferior salivatory nucleus of the medulla oblongata ( medulla ) and leave with the glossopharyngeal nerve ( cranial nerve IX ) through the jugular foramen, the cranial cavity.

The parasympathetic fibers contract as tympanic nerve after exiting the jugular foramen back into the bony skull base. After a short course in the canaliculus tympanic bone between the jugular foramen and carotid canal reach the fibers in the tympanic cavity ( glenoid tympani ), where they, together with the N. caroticotympanicus from the internal carotid plexus ( from the neck sympathetic trunk ) and a communicating branch from the Intermediusanteil of the facial nerve tympanic form the plexus. The fibers of this plexus eventually converge to the lesser petrosal nerve, which mainly preganglionic parasympathetic fibers leads. He leaves the temporal bone on the front side through the hiatus canalis nervi petrosi minoris (just caudal to the hiatus for the greater petrosal nerve ), passes under the dura mater anteromedially lacerum foramen or fissure sphenopetrosa lacerum at the lateral margin of the foramen. After his discharge from the fossa media of lesser petrosal nerve enters the infratemporal fossa and extends to the otic ganglion, which lies medial to the foramen ovale and the division point of the mandibular nerve. Here, the fibers be switched from pre- to postganglionic and are deposited on a communicating branch to the vagus auriculotemporalis from the mandibular nerve of the trigeminal nerve ( fifth cranial nerve) to. With another anastomosis to the facial nerve, the fibers are distributed in the parotid gland via its branches, the parasympathetic fibers of the glossopharyngeal nerve reach their destination ( parotid gland ).

  • Cranial nerve
  • Autonomic Nervous System
Auriculotemporal nerve
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