{HEAD ~ Current} in the sensor is confined to {TAIL ~ regions} close to the air bearing surface by an insulator layer to enhance reader sensitivity 
{ HEAD ~ Current } in the sensor is confined to { TAIL ~ regions } close to the air bearing surface by an insulator layer to enhance reader sensitivity
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH