Figure 2.

Ca²⁺ currents and ΔC_m in prehearing gerbil IHCs. A, I_Ca and ΔC_m responses recorded from immature apical (gray traces) and basal (black traces) IHCs. Recordings were obtained in response to 100 ms voltage steps from −81 in 10 mV nominal increments. For clarity, only responses at −81 and −20 mV are shown. B, Average peak I–V (bottom) and ΔC_m–V (top) curves from apical (P5–P6; n = 9) and basal (P6–P7; n = 7) IHCs. C, Synaptic transfer functions obtained by plotting average ΔC_m against the corresponding I_Ca between −71 mV and near −11 mV from B for apical and basal IHCs. Single data points (gray circles) are also shown. The fits are according to Equation 1. Error bars indicate SEM.