In one enablement, electrical leads, not shown, are attached to the electrodes 24 and 26 and extend in {TAIL ~ the wall} of {HEAD ~ the sheath} 12 
In one enablement , electrical leads , not shown , are attached to the electrodes 24 and 26 and extend in { TAIL ~ the wall } of { HEAD ~ the sheath } 12
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH