a plurality of electrodes in an array and adapted to be in {HEAD ~ electrical contact} with {TAIL ~ the body} 
with
a plurality of electrodes in an array and adapted to be in { HEAD ~ electrical contact } with { TAIL ~ the body }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL