{TAIL ~ A chair} is coupled to the shaft by chair coupling member ; a device carriage is coupled to {HEAD ~ the shaft} by a carriage coupling member ; and a footrest assembly is coupled to the shaft by a footrest coupling member  
{ TAIL ~ A chair } is coupled to the shaft by chair coupling member ; a device carriage is coupled to { HEAD ~ the shaft } by a carriage coupling member ; and a footrest assembly is coupled to the shaft by a footrest coupling member
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH