After {HEAD ~ the electrodes} were cemented in {TAIL ~ place}, the ability of each recording site to still detect the neural responses to whisker stimulation was confirmed 
After { HEAD ~ the electrodes } were cemented in { TAIL ~ place } , the ability of each recording site to still detect the neural responses to whisker stimulation was confirmed
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH