">&ensp;</span>the <span  title="" class="an ">&ensp;</span>number <span  title="" class="an ">&ensp;</span>of <span  title="" class="an ">&ensp;</span>action <span  title="" class="an ">&ensp;</span>potentials <span  title="" class="an ">&ensp;</span>per <span  title="" class="an ">&ensp;</span><span  title="CAP" class="an CAP">PDS</span><span  title="CAP" class="an CAP">&ensp;</span><span  title="CAP" class="an CAP">IC</span><span  title="" class="an ">&ensp;</span>nm <span  title="" class="an ">&ensp;</s