biological neuron models
...that certain biological neuron models are a literally spherical cow, in that the cell is approximated to be a sphere?
...that certain <b id="mwARM"><a class="mw-redirect" href="./Biological_neuron_models" id="mwARQ" rel="mw:WikiLink" title="Biological neuron models">biological neuron models</a></b> are a literally <a href="./Spherical_cow" id="mwARU" rel="mw:WikiLink" title="Spherical cow">spherical cow</a>, in that the <a class="mw-disambig" href="./Cell" id="mwARY" rel="mw:WikiLink" title="Cell">cell</a> is approximated to be a sphere?