Not a tributary of cavernous sinus:: (A) Superior petrosal sinus, (B) Sphenoparietal sinus, (C) Inferior ophthalmic vein, (D) Superficial middle cerebral veins
Answer is A. Tributaries of cavernous sinusFrom the orbit:- Superior ophthalmic veins- Inferior ophthalmic vein or its branch- Central vein of the retinaFrom the brain:- Superficial middle cerebral vein- - Inferior cerebral veinsFrom the meninges:- Sphenoparietal sinus- Frontal trunk of the middle meningeal veinDraining channels:- Transverse sinus through the superior petrosal sinusInternal jugular vein through inferior petrosal sinus and through a plexus around the internal carotid aery- Into pterygoid plaexus of veins through the emissary veinsFacial vein through the superor ophthalmic vein