I would suggest vital signs, before and after, be taken ... at a minimum. Perhaps even hours before. Testing for various chemical releases, possibly. Performing PET scans in motion, if it's possible. Monitoring brain wave activity, etc and so forth. IOW .... anything that could possibly show trends and/or changes in the body before, during, and after ... and possibly delineating what sections of the brain are responsible for the responses, yada yada. In other words, dissect it medically as much as necessary to gather more than enough data to reflect the underlying mechanisms responsible.