le="" class="an ">&ensp;</span>continuous <span  title="" class="an ">&ensp;</span>external <span  title="" class="an ">&ensp;</span>activation <span  title="" class="an ">&ensp;</span>by <span  title="" class="an ">&ensp;</span>other <span  title="" class="an ">&ensp;</span><span  title="BrainRegionP" class="an BrainRegionP">brain</span><span  title="" class="an ">&ensp;</span>areas <span  title="" class="an ">&ensp;</span>or <span  title="" class="an ">&ensp;</span>if <span  title="" class="an ">&ensp;</s