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The internal carotid plexus (internal 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 Superior Tarsal Muscle 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 trigeminal ganglion, the abducent nerve, and the pterygopalatine ganglion (also named sphenopalatine); it distributes filaments to the wall of the carotid artery, and also communicates with the tympanic branch of the glossopharyngeal nerve. ==Additional images== File:Gray777.png|Nerves of the orbit, and the ciliary ganglion. Side view. File:Ciliary ganglion pathways.png|Pathways in the Ciliary Ganglion. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Internal carotid plexus」の詳細全文を読む スポンサード リンク
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