Accessory meningeal artery

Supply to the cavernous sinus region may arise from the EGA. Arterial branches arise from the different segments of the cavernous carotid artery and course medially, laterally and in the direction of the posterior cranial fossa. These branches will anastomose with branches of the external carotid artery, which will allow a functional approach to this region. The ILT always anastomoses with the artery of the foramen rotundum, the middle meningeal artery and the accessory meningeal artery. It is also called the inferolateral trunk of the cavernous sinus. 

Accessory supply to the nasal fossa and to the cavum has been described in vascular lesions or after proximal ligation via the accessory meningeal arteries and ascending pharyngeal arteries [3,23]. 

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