Nerve of pterygoid canal

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Nerve of Pterygoid Canal

The nerve of the pterygoid canal, also known as Vidian nerve, is a composite nerve formed by the union of the greater petrosal nerve and the deep petrosal nerve in the pterygoid canal. This nerve carries both sympathetic and parasympathetic fibers.

Structure[edit | edit source]

The nerve of the pterygoid canal is formed in the area of the foramen lacerum by the union of the greater petrosal nerve (a branch of the facial nerve) and the deep petrosal nerve (from the carotid plexus). The nerve then travels through the pterygoid canal and ends in the pterygopalatine ganglion.

File:Nerve of pterygoid canal.png
Nerve of pterygoid canal and its course

Function[edit | edit source]

The nerve of the pterygoid canal carries both sympathetic and parasympathetic fibers. The parasympathetic fibers, derived from the facial nerve, provide secretomotor innervation to the lacrimal glands and the mucous glands of the nasal cavity and palate. The sympathetic fibers, derived from the deep petrosal nerve, cause vasoconstriction of the blood vessels in the nasal cavity and palate.

Clinical significance[edit | edit source]

Damage to the nerve of the pterygoid canal can result in a variety of symptoms, including dryness of the mouth and nose, impaired taste, and excessive tearing. This nerve may also be involved in certain types of headaches and facial pain.

See also[edit | edit source]

References[edit | edit source]



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Contributors: Prab R. Tumpati, MD