a computer programmed for analyzing {TAIL ~ said images} for determining the migration of {HEAD ~ the cell} over time; and 
a computer programmed for analyzing { TAIL ~ said images } for determining the migration of { HEAD ~ the cell } over time ; and
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH