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Chorda tympani is a branch of the facial nerve that carries gustatory sensory innervation from the front of the tongue and parasympathetic (secretomotor) innervation to the submandibular and sublingual salivary glands.
In the temporal part of the facial canal, the nerve gives branch to the stapedius muscle and chorda tympani. The chorda tympani supplies taste fibers to the anterior two thirds of the tongue, and also synapses with the submandibular ganglion. Postsynaptic fibers from the submandibular ganglion supply the sublingual and submandibular glands.
It contains cell bodies of first-order unipolar sensory neurons which convey gustatory (taste) afferents from taste receptors of the anterior two-thirds of the tongue by way of the chorda tympani, and of the palate by way of the greater petrosal nerve, From the ganglion, the proximal fibres proceed to the gustatory (i.e. superior/rostral [3 ...
Before the nerve exits the skull via the stylomastoid foramen and after the nerve to the stapedius muscle has branched off, the facial nerve gives off the chorda tympani nerve. This nerve exits the skull through the petrotympanic fissure and merges with the lingual nerve , after which it synapses with neurons in the submandibular ganglion .
A branch of cranial nerve VII, the chorda tympani, runs through the fissure to join with the lingual nerve providing special sensory (taste) innervation to the tongue. Anterior tympanic artery and tympanic veins also pass through the structure.
On the inner surface of the tympanic membrane, the chorda tympani crosses this area. The name Shrapnell's membrane refers to Henry Jones Shrapnell, [1] and the name Rivinus' ligament to Augustus Quirinus Rivinus. [2]
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The right membrana tympani with the hammer and the chorda tympani, viewed from within, from behind, and from above Auditory tube, laid open by a cut in its long axis Chain of ossicles and their ligaments, seen from the front in a vertical, transverse section of the tympanum (tympanic cavity)