▁the ▁brain , ▁using ▁very ▁sensitive ▁magnet om eters . ▁Array s ▁of ▁S Q UID s ▁( super con duct ing ▁quantum ▁inter ference ▁devices ) ▁are ▁the ▁most ▁common ▁magnet ometer . ▁App lications ▁of ▁M EG ▁include ▁basic ▁research ▁into ▁per cept ual ▁and ▁cogn itive ▁brain ▁processes , ▁local izing ▁regions ▁affected ▁by ▁path ology ▁before ▁surg ical ▁removal , ▁determ ining ▁the ▁function ▁of ▁various ▁parts ▁of ▁the ▁brain , ▁and ▁ne uro feed back . ▁This ▁can ▁be ▁applied ▁in ▁a ▁clin ical ▁setting ▁to ▁find ▁locations ▁of ▁ab normal ities ▁as ▁well ▁as ▁in ▁an ▁experimental ▁setting ▁to ▁simply ▁measure ▁brain ▁activity . ▁ ▁Mag net ic ▁reson ance ▁imag ing ▁( M RI ) ▁is ▁used ▁for ▁sc anning ▁the ▁brain ▁for ▁topological ▁and ▁land mark ▁structure ▁in ▁the ▁brain , ▁but ▁can ▁also ▁be ▁used ▁for ▁imag ing ▁activation ▁in ▁the ▁brain . ▁While ▁detail ▁about ▁how ▁M RI ▁works ▁is ▁reserved ▁for ▁the ▁actual ▁M RI ▁article , ▁the ▁uses ▁of ▁M RI ▁are ▁far ▁reaching ▁in ▁the ▁study ▁of ▁neu ros cience . ▁It ▁is ▁a ▁corner stone ▁technology ▁in ▁studying ▁the ▁mind , ▁especially ▁with ▁the ▁advent ▁of ▁functional ▁M RI ▁( f M RI ). ▁Function al ▁M RI ▁measures ▁the ▁o xygen ▁levels ▁in ▁the ▁brain ▁upon ▁activation ▁( high er ▁o xygen ▁content ▁= ▁neural ▁activation ) ▁and ▁allows ▁research ers ▁to ▁understand ▁what ▁lo ci ▁are ▁responsible ▁for ▁activation ▁under ▁a ▁given ▁stim ulus . ▁This ▁technology