<prompt> Cochlear implant is done in:Scala vestibuliScala tympaniCochlear ductEndolymphatic duct  <response>: MIC Surgical approach for placing cochlea implant Facial Recess approach Posterior tympanotomy which involves doing a coical I mastoidectomy. From the middle ear the electrodes are then introduced into the scala tympani through the round window. Recently Veria technique Non-Mastoidectomy technique is gaining popularity for cochlear implantation. It uses transcanal approach.Advantage of Vera techniqueSimpleLess chances of injuring facial nerveSuitable in young children where mastoid has not developed fully. 