This results in {HEAD ~ a sensor} that is unaffected by damage at {TAIL ~ outer edges} of the sensor layers 
This results in { HEAD ~ a sensor } that is unaffected by damage at { TAIL ~ outer edges } of the sensor layers
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH