s="an ">&ensp;</span>of <span  title="" class="an ">&ensp;</span><span  title="BrainRegionP" class="an BrainRegionP">dorsal</span><span  title="" class="an ">&ensp;</span>root <span  title="" class="an ">&ensp;</span>stimulation <span  title="" class="an ">&ensp;</span>and <span  title="" class="an ">&ensp;</span>of <span  title="" class="an ">&ensp;</span>substance <span  title="" class="an ">&ensp;</span>P <span  title="" class="an ">&ensp;</span><span  title="CAP" class="an CAP">SP</span><span  title="" 