The electrodes 12 can be constructed from any conductive material such as copper, iron, and {HEAD ~ aluminum} The electrodes 12 should also be constructed with sufficient stiffness for manipulating {TAIL ~ the tissue surface} 
The electrodes 12 can be constructed from any conductive material such as copper , iron , and { HEAD ~ aluminum } The electrodes 12 should also be constructed with sufficient stiffness for manipulating { TAIL ~ the tissue surface }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL