What nerve innervates the parotid?
glossopharyngeal nerve
Sympathetic and parasympathetic fibers innervate the parotid gland. Sympathetic innervation causes vasoconstriction, and parasympathetic innervation, from the glossopharyngeal nerve (CN IX), produces the secretion of saliva.
What is the sensory innervation to the parotid gland?
General sensory innervation to the parotid gland, its sheath, and the overlying skin is provided by the auriculotemporal nerve. The autonomic innervation controls the rate of saliva production and is supplied by the glossopharyngeal nerve.
Are salivary glands innervation by parasympathetic?
All salivary glands are supplied by cholinergic parasympathetic nerves which release acetylcholine that binds to M3 and (to a lesser extent) M1 muscarinic receptors, evoking the secretion of saliva by acinar cells in the endpieces of the salivary gland ductal tree.
Which nerve supplies the parasympathetic Secretomotor innervation of the parotid gland?
The sensory nerve supply to the parotid gland is provided by the parotid branches of the auriculotemporal nerve, a branch of the mandibular nerve (CN V3), which also carry the postganglionic parasympathetic fibers mentioned above.
What Innervates sublingual gland?
Innervation. The nervous supply of the sublingual gland reflects that of the submandibular gland. It occurs via the chorda tympani, which carries fibers that originate from the facial nerve (CN VII) and are classed as secretomotor fibers.
Does the facial nerve innervate the parotid gland?
The facial nerve then passes through the parotid gland, which it does not innervate, to form the parotid plexus, which splits into five branches (temporal, zygomatic, buccal, marginal mandibular, and cervical) innervating the muscles of facial expression.
What Innervates submandibular gland?
The parasympathetic innervation of both the submandibular and sublingual glands is the chorda tympani branch of the facial nerve. Preganglionic fibers are carried with this nerve (via the lingual nerve) to the submandibular ganglion.
Does vagus nerve innervate salivary glands?
The chorda tympani nerve represents an efferent pathway that originates in the superior salivary nucleus (SSN) of the medulla oblongata and innervates the salivary glands (13). The afferent vagal nerve terminates in the nucleus of the solitary tract (NTS), which is anatomically connected to the SSN (1, 2, 35).
What does parasympathetic innervation mean?
Parasympathetic nervous system: The part of the involuntary nervous system that serves to slow the heart rate, increase intestinal and glandular activity, and relax the sphincter muscles. The parasympathetic nervous system, together with the sympathetic nervous system, constitutes the autonomic nervous system.
Which gland receives parasympathetic innervation from the glossopharyngeal nerve CN IX )?
General visceral efferent fibers (visceral motor) provide parasympathetic innervation to the parotid glands. The fibers originate in the inferior salivary nucleus then travel with the tympanic nerve through the foramen ovale, and synapse at the otic ganglion.
What kind of innervation does the parotid gland receive?
The parotid gland receives both sensory and autonomic innervation. General Sensory innervation to the parotid gland, its sheath, and the overlying skin is provided by the great auricular nerve. The autonomic innervation controls the rate of saliva production and is supplied by the glossopharyngeal nerve.
What kind of disease is inflammation of the parotid glands?
Infectious disease. Parotitis is an inflammation of one or both parotid glands, the major salivary glands located on either side of the face, in humans. The parotid gland is the salivary gland most commonly affected by inflammation.
When does fatty infiltration of the parotid gland occur?
There is moderate fatty infiltration or fatty replacement of the parotid glands with age 6. The gland usually contains several intraparotid lymph nodes. These are typically situated in two locations within the gland: pre-trial (pre-auricular) and in the apex of the superficial lobe.
How is an extraoral examination of the parotid gland done?
For extraoral examination the patients head should be inclined forwards in order to maximally expose the parotid and submandibular glands. A normal parotid gland is barely palpable and a normal sublingual gland is not palpable. Intra-oral examination should include observations for asymmetry, discolouration,…