Abstract: An exemplary cochlear electrode array includes a flexible body having a pre-curved spiral shape so as to conform with the curvature of a human cochlea, a plurality of stimulation electrode contacts spaced apart along a first side of the flexible body, a bundle of wires embedded within the flexible body for electrically connecting the electrode contacts to at least one stimulation signal source, at least one inflatable portion extending along at least part of the length of the flexible body, the at least one inflatable portion being adapted to straighten the flexible body, starting from the pre-curved shape, prior to insertion into the cochlea upon being inflated by being filled with gas or liquid, and to allow the flexible body to gradually reassume its pre-curved shape during insertion of the flexible body into the cochlea upon gradual withdrawal of gas or liquid from the at least one inflatable portion.