The hidden layer 16 includes nodes 20 in which the output of the node is fed back to that node as an input with {HEAD ~ a unit delay} produced by {TAIL ~ a delay device} 24 occurring in the feedback path 22  
The hidden layer 16 includes nodes 20 in which the output of the node is fed back to that node as an input with { HEAD ~ a unit delay } produced by { TAIL ~ a delay device } 24 occurring in the feedback path 22
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH