{TAIL ~ at least one pair} of {HEAD ~ electrodes}, the ground member of said at least one pair of electrodes being in electrical communication with electrical output flowing through said analog switch 
{ TAIL ~ at least one pair } of { HEAD ~ electrodes } , the ground member of said at least one pair of electrodes being in electrical communication with electrical output flowing through said analog switch
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH