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