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