{HEAD ~ The apparatus} is configured to minimize {TAIL ~ the influence} of other joints on the rotation analysis 
is configured to minimize
{ HEAD ~ The apparatus } is configured to minimize { TAIL ~ the influence } of other joints on the rotation analysis
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH