Endolymphatic duct connects which structure -

Endolymphatic duct – It is a part of membranous labyrinth (Scala media) It is formed by union of saccule and utricle It connects scala media to subdural space Its terminal part is dilated to form the endolymphatic sac Endolymphatic sac lies between the two layers of dura on the posterior surface of petrous bone Surgical importance – Endolymphatic sac is exposed for drainage or shunt operation in Meniere’s disease ALSO KNOW Ductus reuniens – connects cochlear duct to saccule Aqueduct of cochlea – connects scala tympani to subarachnoid space