{TAIL ~ The vacuum} anchors the surrounding tissue and mediates against the “tenting” of {HEAD ~ tissue} during electrode penetration 
{ TAIL ~ The vacuum } anchors the surrounding tissue and mediates against the “ tenting ” of { HEAD ~ tissue } during electrode penetration
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH