Reticular membrane

The reticular membrane (RM, also called reticular lamina or apical cuticular plate) is a thin, stiff lamina that extends from the outer hair cells to the Hensen's cells. The RM is composed of the phalangeal extensions of the outer hair cells interspaced with extensions coming from the outer phalangeal cells. The RM separates endolymph in the cochlear duct from underlying corticolymph and perilymph of the scala tympani.