The control system 34 is coupled to a pacing, or {HEAD ~ stimulation}, channel 24 and {TAIL ~ a sensing channel} 26 
The control system 34 is coupled to a pacing , or { HEAD ~ stimulation } , channel 24 and { TAIL ~ a sensing channel } 26
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH