internal carotid plexus, a network of nerves on the internal carotid artery, formed by the internal carotid nerve. The internal carotid plexus supplies sympathetic fibers to the branches of the internal carotid artery, the tympanic plexus, the nerves of the cavernous sinus, and the cranial parasympathetic ganglia through which the fibers pass. Compare common carotid plexus, external carotid plexus.
