an  title="" class="an ">&ensp;</span>slices <span  title="" class="an ">&ensp;</span>revealed <span  title="" class="an ">&ensp;</span>rhythmic <span  title="" class="an ">&ensp;</span>transients <span  title="" class="an ">&ensp;</span>in <span  title="" class="an ">&ensp;</span><span  title="Size" class="an Size">small</span><span  title="" class="an ">&ensp;</span>clusters <span  title="" class="an ">&ensp;</span>of <span  title="" class="an ">&ensp;</span><span  title="Neuron" class="an Neuron">neurons