{HEAD ~ The node} performs {TAIL ~ a transfer function operation} based on the inputs from the previous layer and the delayed outputs 
performs
{ HEAD ~ The node } performs { TAIL ~ a transfer function operation } based on the inputs from the previous layer and the delayed outputs
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH