The transient K⁺ currents displayed sensitivity towards holding potentials, and the magnitude changes during development.

<p>(<b>A–B</b>) Examples of current traces recorded at E12 and P2 from HCs from apical and basal aspects of the basilar papilla. Current traces were elicited using 250-ms depolarizing voltage steps in 10-mV increments from −80 to 50 mV. For clarity, traces are shown in 20 mV increments. The holding potentials were −90 mV (<i>a</i>) and −30 mV (<i>b</i>). The difference in current (<i>a–b</i>) is shown as well. (<b>A–B</b>) Plots of the mean current-voltage relationships are shown, corresponding to changes in the magnitude of the transient current at different developmental stages. (<b>C</b>) Mean difference current density at +0 mV at apical and basal regions of the basilar papilla (pA/pF) at E8, E10, E12, E16, and P2. The holding potential-sensitive current density decreased during development. (E8, n = 4; E10, n = 7; E12, n = 16; E16, n = 5; P2, n = 9).