Which nerve goes through the tympanic cavity?
The tympanic nerve (Jacobson’s nerve) is a branch of the glossopharyngeal nerve found near the ear….
| Tympanic nerve | |
|---|---|
| FMA | 53480 |
| Anatomical terms of neuroanatomy |
What does the tympanic nerve do?
In addition to conveying parasympathetic fibres to the parotid, the tympanic nerve provides somatic fibres to the tympanic cavity: the medial wall of the tympanic membrane, mastoid air cells and the Eustachian tube[8,22].
Where is the tympanic nerve located?
The Tympanic Nerve (n. tympanicus; nerve of Jacobson) arises from the petrous ganglion, and ascends to the tympanic cavity through a small canal on the under surface of the petrous portion of the temporal bone on the ridge which separates the carotid canal from the jugular fossa.
Where does the tympanic nerve come from?
The tympanic nerve (or nerve of Jacobson) arises from the glossopharyngeal nerve most often at the level of inferior ganglion and occasionally at a higher level (Donaldson, 1980). The tympanic nerve may arise from two roots, one of which may come from the vagus (Cruveilhier, 1844).
What is the Jacobson nerve?
Jacobson’s nerve is a tympanic branch of the glossopharyngeal nerve, arising from its inferior ganglion. It enters the middle ear cavity through the inferior tympanic canaliculus, runs in a canal on the cochlear promontory and provides the main sensory innervation to the mucosa of the mesotympanum and Eustachian tube.
What is tympanic canal?
The tympanic membrane is also called the eardrum. It separates the outer ear from the middle ear. When sound waves reach the tympanic membrane they cause it to vibrate. The tympanic membrane is made up of a thin connective tissue membrane covered by skin on the outside and mucosa on the internal surface.
What muscles does the tympanic nerve innervate?
Tympanic nerve (AKA nerve of Jacobson) – carries parasympathetic fibers and eventually becomes the lesser petrosal nerve, exiting the skull via the foramen ovale and synapses in the otic ganglion. Stylopharyngeal nerve – provides motor innervation to the stylopharyngeus muscle.
What is Jacobson nerve?
Is tympanic membrane outer or middle ear?
The tympanic membrane is a very thin structure that separates the outer ear canal from the middle ear space.
What does tympanic mean?
Tympanic: 1. Pertaining to the tympanum (the eardrum). 2. Pertaining to the tympanic cavity. 3.
What does the glossopharyngeal nerve supply?
Containing both sensory and motor components, the glossopharyngeal nerve provides somatic motor innervation to the stylopharyngeus muscle, visceral motor innervation to the parotid gland, and carries afferent sensory fibers from the posterior third of the tongue, pharynx, and tympanic cavity.
Where does the nerve of Jacobson come from?
The tympanic nerve (or nerve of Jacobson) arises from the glossopharyngeal nerve most often at the level of inferior ganglion and occasionally at a higher level (Donaldson, 1980 ). The tympanic nerve may arise from two roots, one of which may come from the vagus ( Cruveilhier, 1844 ).
Where is the tympanic nerve located in the ear?
The tympanic nerve (Jacobson’s nerve) is a branch of the glossopharyngeal nerve found near the ear.
Who is credited with the discovery of the tympanic nerve?
We also provide a brief summary of the life and achievements of the indefatigable Ludwig Levin Jacobson, an anatomist and military surgeon, who is credited with the discovery of the tympanic nerve. Citation: Kanzara T, Hall A, Virk JS, Leung B, Singh A. Clinical anatomy of the tympanic nerve: A review.
Where does the deep petrosal nerve join the tympanic nerve?
The caroticotympanic nerve. This penetrates the tympanic cavity and unites with a branch of the tympanic nerve (IX, nerve of Jacobson). The deep petrosal nerve. At the exit of the carotid canal, this crosses the foramen lacerum and joins the greater petrosal nerve of VII to constitute the vidian nerve, destined for the pterygopalatine ganglion.