Internal carotid plexus

Internal carotid plexus

Infobox Nerve
Name = Internal carotid plexus
Latin = plexus caroticus internus
GraySubject = 215
GrayPage = 977


Caption = Sympathetic connections of the ciliary and superior cervical ganglia. (Carotid plexus visible center top.)


Caption2 = Diagram of the cervical sympathetic. (Carotid plexus visible center top.)
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DorlandsPre = p_24
DorlandsSuf = 12647616
The internal carotid plexus (carotid plexus) is situated on the lateral side of the internal carotid artery, and in the plexus there occasionally exists a small gangliform swelling, the "carotid ganglion", on the under surface of the artery.

Postganglionic sympathetic fibres ascend from the superior cervical ganglion, along the walls of the internal carotid artery, to enter the internal carotid plexus. These fibres then distribute to deep structures, which include the levator palpebrae superioris and pupillary dilator muscles. [Hal Blumenfeld, "Neuroanatomy through Clinical Cases", Sinauer Associates, 2002, p543] Some of the fibres from the internal carotid plexus converge to form the deep petrosal nerve. [Richard L. Drake, Wayne Vogel & Adam W M Mitchell, "Gray's Anatomy for Students", Elsevier inc., 2005]

The internal carotid plexus communicates with the semilunar ganglion, the abducent nerve, and the sphenopalatine ganglion; it distributes filaments to the wall of the carotid artery, and also communicates with the tympanic branch of the glossopharyngeal nerve.


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References


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