Each node within each layer also receives {HEAD ~ a delayed output} produced by {TAIL ~ a delay unit} 36 from all the other nodes within the same layer 16 
produced by
Each node within each layer also receives { HEAD ~ a delayed output } produced by { TAIL ~ a delay unit } 36 from all the other nodes within the same layer 16
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 OTH OTH OTH