The systems and {HEAD ~ methods} advance {TAIL ~ the electrode} to penetrate tissue drawn against the carrier 
The systems and { HEAD ~ methods } advance { TAIL ~ the electrode } to penetrate tissue drawn against the carrier
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH