<p>The steady state values of <i>I<sub>h</sub></i>-activation (<b>A</b>), and activation time constant (<b>B</b>), fitted to data from three INs (plusses, circles and diamonds). A simulation of the <i>I<sub>h</sub></i>-current at different step potentials between -130 and -65 mV, with 5mV steps (<b>C</b>) gives similar traces to those seen experimentally (see <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1002160#pcbi-1002160-g002" target="_blank">Figure 2C</a>).</p
