Abstract
The reticular membrane is composed of the brush border of hair cells and the tops of their supporting apparatus. The receptor membrane is considered to have a polarizing property since the phase of cochlear microphonics (CM) is reversed in electrode penetration from one side of the reticular membrane to the other and also the amplitude of CM is increased or decreased by appling current through the membrane.The sensory hairs of hair cells face to an environment of high potassium and very low calcium concentrations. This characteristic ionic environment is necessary to the maintenance of the CM sensitivity. The role of calcium ions in the initial receptive process of hair cells is discussed.
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