Most potential route for transmission of Meningitis from CNS to Inner ear is:
Cochlear Aqueduct
Endolymphatic sac
Vestibular Aqueduct
Hyl's fissure
Most potential route for transmission of Meningitis from CNS to Inner ear is Cochlear Aqueduct. The scala tympani is closed by secondary tympanic membrane; it is also connected with the subarachnoid space through the aqueduct of cochlea. Hence the infections from meninges can spread to inner ear.