span class="c1"># to extract hemisphere plotting values, we must supply the name</span>
<span class="c1"># of the parcellation here.</span>
<span class="n">surf_ref</span> <span class="o">=</span> <span class="n">SurfRef</span><span class="p">(</span><span class="n">space</span><span class="o">=</span><span class="s1">'fsaverage5'</span><span class="p">,</span> <span class="n">parc</span><span class="o">=</span><span class="s1">'destr'</span><span class="p">,</span> <span class="n">verbose</span><span class