some interesting articles: http://www.ai.mit.edu/projects/medical-vision/surgery/tms.html http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?holding=npg&cmd=Retrieve&db=PubMed&list_uids=9547074&dopt=Abstract http://www.psychology.nottingham.ac.uk/staff/cr1/3rdYearProj/grosbras_02.pdf (have a look at its references too)