Internal carotid nerve plexus

Internal Carotid Nerve Plexus

The internal carotid nerve plexus, as illustrated in Gray's Anatomy.

The Internal Carotid Nerve Plexus is a network of nerves located in the carotid canal and along the internal carotid artery. It is primarily composed of sympathetic nerve fibers originating from the superior cervical ganglion.

Structure

The internal carotid nerve plexus is situated in the carotid canal, accompanying the internal carotid artery. It is formed by branches from the superior cervical ganglion and communicates with the abducent, trigeminal, and facial nerves. It also gives off caroticotympanic nerves to the tympanic cavity.

Function

The internal carotid nerve plexus carries sympathetic nerve fibers to the eye and its adnexa, contributing to the pupillary reflex and the regulation of blood flow in the retina and choroid.

Clinical significance

Disruption or damage to the internal carotid nerve plexus can lead to a range of clinical conditions, including Horner's syndrome, which is characterized by ptosis (drooping of the upper eyelid), miosis (constriction of the pupil), and anhydrosis (lack of sweating) on the affected side of the face.

See also

• Carotid artery
• Carotid canal
• Superior cervical ganglion