The electrode terminal is elongated and adapted for orientation in {HEAD ~ a direction} parallel to {TAIL ~ the tissue fibers} 
parallel to
The electrode terminal is elongated and adapted for orientation in { HEAD ~ a direction } parallel to { TAIL ~ the tissue fibers }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL