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