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