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