{HEAD ~ The center region} 34 is divided into two sub regions by {TAIL ~ a non conductive barrier} or insulative region 38 
is divided by
{ HEAD ~ The center region } 34 is divided into two sub regions by { TAIL ~ a non conductive barrier } or insulative region 38
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH