What is the sympathetic innervation of the parotid gland?

Sympathetic innervation originates from the superior cervical ganglion, part of the paravertebral chain. Fibers from this ganglion travel along the external carotid artery to reach the parotid gland. Increased activity of the sympathetic nervous system inhibits saliva secretion, via vasoconstriction.

What does the parotid gland innervation?

Innervation. The parotid gland receives sensory and autonomic innervation. The autonomic innervation controls the rate of saliva production. Sensory innervation is supplied by the auriculotemporal nerve (gland) and the great auricular nerve (fascia).

Which cranial nerve provide sympathetic innervation for the parotid gland?

The postganglionic secretomotor fibers that emerge from the otic ganglion reach the parotid gland via the auriculotemporal nerve (a branch of the mandibular division of the trigeminal nerve [CN V3]). The sympathetic supply is derived from the adjacent sympathetic plexus of the carotid sheath.

What are the effects of sympathetic and parasympathetic stimulation of salivary glands?

Parasympathetic stimulation evokes a copious flow of saliva. In contrast, sympathetic stimulation produces either a small flow, which is rich in protein, or no flow at all.

What nerves innervate the salivary glands?

The salivary glands are supplied by parasympathetic and sympathetic efferent nerves which travel to the glands by separate routes. Once in the glands the axons from each type of nerve intermingle and travel together in association with Schwann cells, forming Schwann-axon bundles.

Which cranial nerve Innervates the parotid salivary gland quizlet?

The facial nerve[VII] passes through the parotid gland and gives rise to 5 terminal branches(together known as the parotid plexus) which go on to innervate the muscles of facial expression. 5 branches include the temporal, zygomatic, buccal, cervical, and marginal mandibular branches.

What are the parasympathetic functions of the facial nerve?

Parasympathetic fibers go to the ganglia that supply glands in the oral cavity and the lacrimal gland. The sensory component provides innervation to the external auditory meatus, the tympanic membrane, and the pinna of the ear. The facial nerve also carries taste sensation from the anterior two-thirds of the tongue.

What does parasympathetic to parotid gland?

They synapse in the otic ganglion, and the postganglionic parasympathetic fibers join the auriculotemporal nerve to innervate the parotid gland to secrete saliva. The neurotransmitters acetylcholine (ACh) and norepinephrine (NE) act within the parotid.

What parasympathetic nerves innervate salivary glands?

The postganglionic parasympathetic fibers of the VII CN enter the sublingual and submanidublar glands and the minor salivary glands of the mucous membrane of the mouth, pharynx and nasopharynx, and those of the IX CN converge into the parotid gland.