{HEAD ~ Neural recordings} could be detected on each recording site in sequence as the electrodes were lowered into {TAIL ~ the brain} 
{ HEAD ~ Neural recordings } could be detected on each recording site in sequence as the electrodes were lowered into { TAIL ~ the brain }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL