Perilymph communicates with subarachnoid space through:
Ans: D (Cochlear aqueduct) Ref: Diseases of the Ear Nose and Throat by PL Dhingra 5th edn .2010.Page 12Explanation:* PerilymphComposition is like extracellular fluidLies between the bony and membranous labyrinthRich in Na+ ions* EndolymphFills the membranous labyrinth.It is rich in K~ ions.Composition is like intracellular fluid.Secreted by the stria vascularis of the crista and dark cells which are seen in the utricle and the ampullary ends of the semi circular canals.
Ductus reunions
Helicotrema
Utriculosaccular duct
Cochlear aqueduct
Ear