{HEAD ~ Each hidden layer} includes nodes in which the output of the node is fed back to that node as an input with {TAIL ~ a unit delay} occurring in the feedback path  
{ HEAD ~ Each hidden layer } includes nodes in which the output of the node is fed back to that node as an input with { TAIL ~ a unit delay } occurring in the feedback path
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH