e="" class="an ">&ensp;</span>rhythmic <span  title="" class="an ">&ensp;</span>activation <span  title="" class="an ">&ensp;</span>of <span  title="" class="an ">&ensp;</span>non <span  title="" class="an ">&ensp;</span>selective <span  title="" class="an ">&ensp;</span>channels <span  title="" class="an ">&ensp;</span>which <span  title="" class="an ">&ensp;</span>had <span  title="" class="an ">&ensp;</span>a <span  title="" class="an ">&ensp;</span>conductance <span  title="" class="an ">&ensp;</span>of