     @setChildren(@rootNeuron)
 
     @neurons = @tree.nodes(@rootNeuron)
+    @shownNeurons = @neurons
 
     @drawLinks()
     @drawNeurons()

      for child in neuron.children
        @setChildren(child)

  showDetails: (node) ->
    $popover = $(".popover")
    # format:
    $popover.find(".popover-title").html(node.title)

                  )
    neuron.append("circle")
          .attr("r", 4.5)
          .style("fill", (d) ->
            if d._children then "lightsteelblue" else "#fff"
          ).on "click", (node) =>
            @toggleNode(node)

    neuron.append('text')
          .attr('dx', -8)
