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