istent <span  title="" class="an ">&ensp;</span>elevation <span  title="" class="an ">&ensp;</span>of <span  title="" class="an ">&ensp;</span>the <span  title="" class="an ">&ensp;</span>tonic <span  title="" class="an ">&ensp;</span>inhibitory <span  title="" class="an ">&ensp;</span>tone <span  title="" class="an ">&ensp;</span>on <span  title="" class="an ">&ensp;</span>the <span  title="" class="an ">&ensp;</span><span  title="BrainRegionP, NeuronWithProperties" class="an BrainRegionP NeuronWithPropert